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SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)

 SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Product Code: ASL • Brand: AMSOIL

The Top Tier of AMSOIL Synthetic Motor Oil

AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types of automotive gasoline engines. By combining industry-premier synthetic technology with AMSOIL premium additives, Signature Series Synthetic Motor Oil exceeds the higher performance demands of modern engines.

Package sizes include:

Quart Bottle
Gallon Bottle
30-Gallon Drum
55-Gallon Drum

See Pricing or Place an Order
MSDSData SheetFrench Data Sheet

Product Details

Product Applications

AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled vehicles. It is recommended for all domestic and foreign vehicles requiring any of the listed performance specifications:

Product Application Specs

• API SN (Resource Conserving), SM...
• ILSAC GF-5, GF-4...
• ACEA A5/B5, A1/B1
• Ford WSS-M2C946-A, WSS-M2C929-A
• Chrysler MS-6395
• GM dexos1™ (supersedes LL-A-025, 6094M and 4718M): Fortified with detergents that exceed dexos1™ sulfated ash specifications.

Product Description

AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types of automotive gasoline engines. By combining industry-premier synthetic technology with AMSOIL premium additives, Signature Series Synthetic Motor Oil exceeds the higher performance demands of modern engines. It withstands the stress of higher horsepower, higher heat and complicated emissions control systems. Signature Series Synthetic Motor Oil is engineered to outperform competitive conventional and synthetic motor oils. It delivers long-lasting performance and protection.

AMSOIL, the leader in automotive synthetic lubrication, produced the world's first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

Extends Drain Intervals

AMSOIL Signature Series Synthetic Motor Oil can extend drain intervals far beyond those recommended for conventional oils. Its unique synthetic formulation and long-drain additive system are inherently stable to resist oxidation and neutralize acids over longer periods. Signature Series Synthetic Motor Oil is designed to deliver the best possible engine protection, cleanliness and performance over extended drain intervals. It reduces vehicle maintenance and waste oil disposal costs.

Oil Filter:

Any brand of oil filter may be used with Signature Series Synthetic Motor Oil. For maximum convenience, however, use an AMSOIL Ea® Oil Filter. Made of fully synthetic media with greater filtering efficiency and dirt-holding capacity than conventional filters, Ea Oil Filters are recommended for 25,000 miles/12 months or 15,000 miles/12 months, depending on application, which coincides with Signature Series' once-a-year drain interval. While Signature Series' 12-month service life remains intact if a non-Ea Oil Filter is used, the filter must be changed according to its manufacturer's recommendations.

Maximizes Fuel Economy

AMSOIL Signature Series Synthetic Motor Oil is designed to maximize energy efficiency for improved fuel economy. Unlike conventional oils, its uniform molecular structure helps it flow more freely and reduce friction between metal surfaces. Anti-friction additives are included to further improve energy efficiency.

Reduces Engine Wear

Signature Series Synthetic Motor Oil provides outstanding anti-wear protection. It has excellent viscosity film strength to separate metal surfaces and robust anti-wear additives to further reduce wear in metal-to-metal contact regions for improved engine life.

Reduces Oil Consumption and Emissions

Volatility (burn-off) occurs when oil gets hot, causing high oil consumption and emissions. AMSOIL Signature Series Synthetic Motor Oil exhibits an extremely low volatility rate; it controls volatility-related oil consumption and emissions.

Excels in Extreme Temperatures

AMSOIL Signature Series Synthetic Motor Oil resists thermal (heat) breakdown better than conventional oils. It is heavily fortified with detergent and dispersant additives to help prevent sludge deposits and keep engines clean. And unlike conventional oils, Signature Series Synthetic Motor Oil contains no wax, staying fluid in the coldest winter temperatures for easier starting, improved oil flow and reduced bearing wear.

Compatibility

AMSOIL Signature Series Synthetic Motor Oil is compatible with other conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil's life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils.

SERVICE LIFE

AMSOIL Signature Series Synthetic Motor Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) gasoline-fueled vehicles as follows:

• Normal Service(3) - Up to 25,000 miles or one year, whichever comes first.
• Severe Service(4) - Up to 15,000 miles or one year, whichever comes first.
• In all non-gasoline-fueled vehicle applications, extend the oil change interval according to oil analysis or follow the OEM* drain interval.

*OEM - Original Equipment Manufacturer

(1) Engines operating under modified conditions (non-stock) are excluded from extended drain recommendations. Examples include the use of performance computer chips; non-OEM approved exhaust, fuel or air induction systems; and the use of fuels other than those recommended for normal operation by the manufacturer.

(2) Mechanically sound engines are in good working condition and do not, for example, leak or consume excessive amounts of oil, are not worn out, do not overheat, do not leak antifreeze and have properly working emissions control systems. AMSOIL recommends repairing malfunctioning engines prior to the installation of AMSOIL synthetic oils.

(3) Personal vehicles frequently traveling greater than 10 miles (16 km) at a time and not operating under severe service.

(4) Turbo/supercharged engines, commercial or fleet vehicles, excessive idling, vehicles with more than 100,000 miles without prior continuous use of AMSOIL motor oil, daily short-trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition driving.

AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. They stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Ea Full-Flow Oil Filters.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL ASL.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Close Product Detail
Technical Data
TYPICAL TECHNICAL PROPERTIES
Signature Series 100% Synthetic 5W-30 Motor Oil (ASL)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)10.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)60.1
Viscosity Index (ASTM D-2270)166
CCS Viscosity, cP @ (°C) (ASTM D-5293)4426 (-30)
Flash Point °C (°F) (ASTM D-92)226 (439)
Fire Point °C (°F) (ASTM D-92)248 (478)
Pour Point °C (°F) (ASTM D-97)-51 (-60)
NOACK Volatility, % weight loss (g/100g) (ASTM D-5800)6.9
High Temperature/High Shear Viscosity
@ 150°C, 1.0 X 106 s.-1), cP (ASTM D-5481)
3.2
Four-Ball Wear Test @ 40 kgf, 75°C,
1200 rpm, 1 hr, scar diameter, mm (ASTM D-4172)
0.35
Total Base Number (ASTM D-2896)12.6
Close Technical Data

Did this product meet your expectations?

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Product Name: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Current Rating: 4.94 out of 5 stars
Total Votes: 101 vote(s)


Reviewed by Jake: space

I continue to buy for all 3 of my vehicles

I let the quick oil change stations change my oil with my oil instead of theirs.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Bowie Maryland,

Reviewed by Mechghy78: space

First time running Amsoil

I changed to amsoil from gm dexos as I wanted something better for my Cruze. After 10k of running dexos as it was included with the car, I switched to amsoil and immediately noticed the engine running quieter than with dexos. I am happy with the change so far and am looking forward to see how it holds up as I only have 1500 miles on it so far. We'll see what happens when I get into my second oil change.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | New Waterford Ohio,

Reviewed by Pinball Bob: space

Great Product! Time order more,

2010 Ford Explorer and soon to be 2015 Chevrolet Silverado. I do have other gas powered items, lawn tractor, edger, tiller, etc. I really need to convert them over as I have had nothing but great results with your product.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Foristell, MO

Reviewed by Gary: space

two stroke oil

I have been using this oil in my dirt bikes for 40 years now!! I mix it with avation fuel at 83 to 1. they have always ran great!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | , Medford Oregon

Reviewed by J-rod: space

Why I made the switch

I made the switch to Amsoil with 25,000 miles on my truck after doing a lot of research on which oils would be best for my style of driving (I do a lot of sever off-road driving in my truck through the California deserts). Due to my style of driving I decided to do an oil change at 10,000 miles rather than the 15,000 that Amsoil recommends for "severe driving". After the first oil change I also had an oil analysis completed. To my surprise the results came back great. They also said I could have probably gone another 3,000 - 5,000 miles! That would have been 13-15K miles between changes with a solid 500 miles of that being run in hot dusty desert conditions with the engine pushing high RPM's... not to mention the LA traffic I get to put up with when I decide to stay on the road.
Long story short... Amsoil is more expensive than most other oils, but you can easily go 2-3x longer between changes!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Southern California,

Reviewed by BCB: space

Yes I will buy this oil again

I use this oil in my 2015 Volvo S60 T-5. The recommended oil is Castrol Professional with an ACEA of A5/B5. I have not been able to purchase this oil even from the dealership (in fact they recommended an off the shelf Castrol oil). Amsoil Signature Series 5w-30 has an ACEA of A5/B5 and I feel it to be a superior oil. Volvo's engines are considered to be long life (million plus miles) I intend to find out with the help of Amsoil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Idaho,

Reviewed by WD: space

I will continue to buy this product.

I use 5-30 in my 5.7 hemi. The mileage increased 3mpg, hence free oil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Montana,

Reviewed by Lemar: space

22 years. It's all I use. It's all I'll ever use

I first started using Amsoil 5W30 on my brand new 1994 Ford Ranger Splash 4.0L on the advice of my uncle who was a dealer at the time. Except for the 4 years I owned a 2004 Saturn Vue 3.5L which used Amsoil Signature Series 5W20, it's all I've used since, and all I'll ever use. It or Amsoil. Here are the vehicles I've used it in, and I advise anyone reading this to use it too.
1978 Ford E150 351W
1994 Ford Ranger Splash 4.0L
1996 Honda Accord 2.2L
1998 Acura 3.5RL
2004 Chevy Trailblazer 4.2L
2003 Saturn Vue 2.2L
2004 Saturn Vue 3.5L (5W20)
2008 Ford Explorer Sport Trac 4.0L
2010 Nissan Altima 2.5 S

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Warner Robins, GA

Reviewed by Tom: space

Start up Noise silenced.

Start ups used to sound like a machine shop and now it much quieter.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Nashville, TN

Reviewed by Lee: space

Great Oil

I purchased a used 2012 Chevy Volt I did not know what oil had been used may have been dealer oil and filter when I drained out the old oil it came out quickly and very dirty that would explain why the engine may have been on the noisy side. I used the required oil that is recommended and when the engine started there was hardly any noise from the engine and very little vibration. Great oil has been running great since I used Amsoil oil and filter.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | MILLBURY, MASS

Reviewed by Motomonkey116: space

Awesome Product

I change my oil 1 a year. I have never had any engine or fuel economy issues. Even when I am low on oil. My vehicle have over 175,000.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Boise, Id

Reviewed by fryer: space

5w30 synthnetic oil

awesome as all Amsoil products are! this stuff kicks ! I will be buying more next month. oil held up great still looks good feels good! oil pressure never dropped and still hasn't dropped. 140000 +miles on it worked great all winter long. and I only have to change my oil once a year! how sweet is that,

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | new york,

Reviewed by tman: space

Very satisfied customer

I've used Amsoil products for many years on both Pickup truck and van. Completely satisfied with the price and performance.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Illinois,

Reviewed by N/A: space

I will continue to purchase Amsoil Signature Series oil!!

I use both Amsoil oil filters and synthetic signature 5W-30 in my 21012 Avalon. Very Happy with both and will continue to use this product. Everyone at Amsoil is always professional and helpful with any questions I have. Great product.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Farragut Iowa,

Reviewed by Archer: space

The good stuff

Dads 1993 ford ranger 2.3 and 230,000 miles really seems to like it. Best we've ever used

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Williamsport Ohio,

Reviewed by Sammich: space

I use it in everything never been any problems

Good product for people who put lots of kms on there vehicles. Bit pricey

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Bc Canada,

Reviewed by Maximum RPM: space

Excellent reliable Service

It didn't take long for my order of oil and filters to arrive. I remember placing the order, next thing I knew it was at my door. You don't get service like that anywhere else

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Montgomery, AL

Reviewed by Ash: space

I will continue to buy this for my car

I love the product I only wish you offered free shipping more often .

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Texas,

Reviewed by Fishnpole: space

Great product, will buy again

Bought a 2013 Tacoma brand new. First thing I did was drain the fluids and replaced everything with amsoil product. Dealer techs thought I was crazy because they offer 2 years free oil changes, I think they are crazy for try to put another oil in my pickup. Love this stuff and only need to change once a year.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Spokane, WA

Reviewed by Louis: space

Improved gas mileage

I have used this oil in my 2008 Toyota Prius since November 2015. There was a noticeable improvement in gas mileage. I consistently get 52 to 54 MPG. My Prius has 183.000 miles and it runs better than new. It does have higher oil consumption than when I used petroleum based oil, but it hasn't impacted the performance. It should help the engine last a long time.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Pendleton County, WV

Reviewed by Cecil: space

Great product

A little pricey but after researching the product, it's the best in the industry. Kinda get what you pay for.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Palm coast Florida,

Reviewed by Butch: space

fewer oil changes

I have been using Amsoil signature series 5w-30 synthetic oil about 3 years and am very happy with it. I change my oil just once a year now compared to 2-3 times in the past. My engine runs great and in the long run it costs me less, no engine repairs or tune-ups other than normal maintenance. This is great considering I tow a 20 ft boat and put on at least a thousand miles a year just towing. I am very happy with this product and highly recommend it.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Howards Grove, Wi 53083

Reviewed by Rainman0069: space

Perfect Oil

Have been using Signature Series oil for years in all my vehicles, past and present. Long life and excellent protection. 2008 G8 GT 6.0L used Signature Series since day one, 120K later, engine still like new.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Marion, IL

Reviewed by Mickie: space

Amsoil The truth

Took a long hard look at using Synthetic Motor Oil Products , back in the middle 90s, and have spent over 30 years in the Air Force I knew what synthetics were about.. And now I only had to figure out what were the best ones to use in my Cars and Trucks..
After about 8 mos of researching Fiction and Fact about Synthetic products, ( They are not all the same, especially the Base Oil ) I settled on AMSOIL for my Oil and Especially Filter Needs .. I feel that the Most important part of using Synthetic products is the OIL Filter, and its Specifications.. Many Filter Manufactures are reluctant to give information on their filters makeup. But you can find it if you dig deep enough and Understand the Testing regime used to make comparisons. AMSOIL has been around longer than anyone when it comes to synthetic oil for your vehicles.. Just go with the Best.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Felton Del,

Reviewed by Jeremy: space

Great product and service!

Quick delivery couldn't ask for a better way to buy oil!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Yorba Linda CA,

Reviewed by Chris: space

Good first impression

So far, so good. Oil levels have been maintained with the usual discoloration. I'm waiting for my next oil change in order to perform an oil analysis. Then I shall know the truth of Amsoil's claims for myself. But, for the time being, I am impressed.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Lawrence, MA

Reviewed by jc: space

signature series

I do like the ams products. Its definitally one of the best oils on the market. Is rate it as good or better than mobile 1 which says alot. Ive tried the racing oil as well and it is awesome.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | lafayette, louisiana

Reviewed by Jose: space

Love this oil and will continue to buy it!!!

I have a 2015 chevy cruze and I change the oil every 20,000 to 25,000 miles. I use to have a 2011 chevy cruze before and i changed the oil between 20,000 to 25,000 miles. The engine runs cooler never had a problem running with this oil. I recommend everyone to switch to this oil. Buy!!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Chicago, IL

Reviewed by Hoosier Cruiser: space

Excellent Product

I have been using Amsoil signature oil in my vehicles for the past year and have been able to cut the cost of oil changes by approximately 50% ! I am sold in Amsoil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Orleans, Indiana

Reviewed by Mitch: space

Signature 5w-30 is my homeowners Fleet oil.

I have used signature 5w-30 as my all-around oil in everything I own. Cars , trucks, lawn mowers, snow thrower and generator. Since 1994 I've never had an oil related issue and it makes oil changes simple , just grab the Signature 5-30!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Cape Cod MA.,

Reviewed by Storm Petrol: space

This Oil Saved an Engine.

Our 1999 Odyssey wouldn't start after our son pulled off the highway to tighten down the tarp on the trailer he was towing. By the time the tow truck driver got there, it did start. The driver said he would follow for a time to insure the van kept going before he went on.

The engine temperature immediately jumped into the red zone. An inspection showed that the rusted hose clamp at the bottom of the radiator had given up--there was nothing in the cooling system!

After a tow to the shop, with the addition of a new clamp and coolant, the vehicle started.

1300 miles later, we heard about this from or second son and our mechanic checked for codes. The sensor had recorded 395F at the time of this incident!

I immediately replaced the crank oil for 5 new quarts of Signature Series 5W-30. The old stuff, which only had a few thousand miles on it, smelled just slightly burned.

Our mechanic said he would typically expect the engine to be toast, with vital components even melted! Yet, although we don't know the actual condition of the rings, pistons and cylinder walls, the car is running well, with no misses or apparent loss of power.

The only reason we can all think of for survival of the engine is the Amsoil, with its superior cooling qualities.

It gets the credit for the fact that the engine is still running at all!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Plattsburgh, NY

Reviewed by Steve: space

Great product

Is this product and love the 25,000 mile oil change!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Tulsa,

Reviewed by TINY61: space

TREAT IT RIGHT

THIS IS ONLY COMMON SENSE. IF YOU KEEP ONLY THE BEST LUBRICANTS IN YOUR EQUIPMENT IT WILL GIVE YOU ITS' BEST PERFORMANCE. AS THE COST OF MODERN VEHICLES IS SO PROHIBITIVE IT MAKES GOOD SENSE TO USE THE BEST. MY VEHICLES FROM MY 1978 THROUGH MY 2008 ALL PREFORM BETTER WITH AMSOIL.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | MICHIGAN AND ARIZONA,

Reviewed by Miller: space

Yes I run amsiol in everything

I my truck, cars all the time since 1999

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Harrod, ohio

Reviewed by Al: space

I use And oil lubricants almost exclusively!

My wife calls me a techno-geek. It's actually true. I am an engineer. I research everything I purchase. When I purchased a used pickup in 2006 it had 180K miles. I immediately changed ALL of the fluids to their respective types with Amsoil. My pickup now has 373K . I would not hesitate to drive it to Alaska and back. I trust Amsoil in all my machines.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Standpoint, Idaho

Reviewed by amsoil man: space

over 300,000 and still going!

I run this in every car I own and have for years. less maintenance since you only have to change it once a year is worth a little extra cost to me started putting it in my 5.4 triton truck when I got it used with like 160k on it. it smokes like heck but still going at over 300,000 miles!! that is really saying something about this oil and it burns less of amsoil than other synthetics.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | st. petersburg fl,

Reviewed by Bob: space

Years of use

Have used Your products for over 20 years in all my vehicles

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Fort Lauderdale,

Reviewed by Dennis: space

I would buy this product again, and I have several times.

the best oil money can buy, don't take my word, try it for your self.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Barstow, CA

Reviewed by T-Lou: space

Signature Series Oil

Like the longevity.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Lafayette, La

Reviewed by Redman: space

Best Product Ever

I've been using AMSOIL for going on three years and its nice knowing that my 12 year old truck wither 175,000 miles and is protected by the best synthetic oil on the market and continues to run great. Once a year old changes, with a mid year oil filter is easy maintenance. I recommend AMSOIL products to all the people I talk to who are being thrifty with their older vehicles. Compared to the costs of simple oil changes at a garage. AMSOIL products that I have tried have stood up to the advertising they offer, and its rare to get exactly what you read about these days.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Navarre, Fl

Reviewed by Jon: space

Love the extended oil changes

I am a part time collage student getting my certification in auto mechanics, my engine seems to run quieter and the mileage has gone up maybe 1 or 2 mile.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Schertz TX,

Reviewed by Annie: space

Make your vehicle go, go, go for the LONG haul

I grew up in a family where good oil was the name of the game to keep your vehicle going for many miles. Just when you think the car is on it's last leg it will keep running and I believe it is due to the success of Amsoil products being used. If you are looking to only have to change your oil 2 times a year, once in the spring and once in the fall. I recommend you to buy this product. I have had great success with my vehicles and with Amsoils services.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Mpls, MN

Reviewed by This is a stupid question: space

AMSOIL

I bought it, it came, I used it.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Florida,

Reviewed by Kyle O.: space

Pure and easy no spill spill spout

Excellent used oil analysis after 10k miles - better than Royal Purple. Just remember to top off. The wider opening helped me give a controlled pour. Everything went in.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Bowling Green, Kentucky

Reviewed by traderdollar: space

So Far So Good

Put it in my 125K, 2005 Lexus RX 330, along with the Amsoil filter. Every thing fine so far. I'm looking forward to what the oil looks like in 10K miles. Actually, looks probably don't mean much. Would need to test.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Walla Walla,

Reviewed by WVJAY: space

The BEST of the BEST

I have been using the Signature Series for many years in my 2002 Olds Bravada. I purchased it new and have always used synthetic oil. The main reason I use Amsoil Sig series is the long intervals. When a person can change their oil once a year vs 4 times a year it was a no brainer. Once a year is much less work for me and it's WAY CHEAPER!!! I highly recommend using Amsoil and I believe when you try it u will be extremely impressed.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Mineral Wells, WV

Reviewed by Aguaman: space

Love this oil, I've been using it for years.

I use this oil in both my car and truck. I like how I can schedule my oil changes during the nice weather seasons here in Idaho. I been changing the oil once a year without any issues. The oil always looks very clean and clear at changes.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Richfield Idaho,

Reviewed by mttrsn1: space

Amsoil 5w30 Signature Series

This is the Staple in any engines life! Have been using this Amsoil product for 16 years now in many different vehicles. Use Amsoil products in all my equipment, SUV's, cars, lawn tractors and mowers, from the motor oil to the transmission fluid to gear lube/differential. Never have to worry about or even think about if you have the best protection possible. Engines run very clean, smoother, quieter, and noticeably better fuel mileage. Outstanding performance!!!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | South Carolina,

Reviewed by Tony: space

I buy nothing else for my vehicles!

I use Amsoil in all of my engines and I have never had any issues. I get great gas mileage and when the oil is changed, it doesn't look much darker than when it went in. I am a preference type person, and I prefer nothing else but Amsoil. All of their products are the best, first class!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Albuquerque, NM

Reviewed by David.: space

Ls1

The typical cold engine slap noise is gone. Oil pressure stays up after engine warms up and fuel mileage continues to climb. Do not hesitate to buy this oil. Mobil 1 isn't close!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Murfreesboro,

Reviewed by Mark: space

Amsoil is superior.

A number of years ago I learned that synthetic oil was superior to conventional oil. Shortly thereafter I tried amsoil and discovered that amsoil was superior to other synthetic oils. This became evident when I started traveling on 2250 mile trips on a fairly regular basis. Other synthetics needed a quart on the trip. Amsoil, none.
I researched the issue and a competitor alleged that the difference was based upon Amsoil's use of too much of a certain additive and that that additive would ruin a catalytic converter. I have put over 150,000 miles on three different vehicles and none ever needed a catalytic converter or oxygen sensor.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | New York and Arizona,

Reviewed by Strick: space

Great product

I have used this product for about eight years now and my car is 13 years old and still going strong/

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Tunkhannock Pa,

Reviewed by Jmlo96: space

Best Synthetic Oil

I run this oil in my turbocharged Chevy Cruze. It is clear in the numerous tests that Amsoil makes a superior oil. I was sold on Amsoil when I had a rough manual transmission shift, and the Amsoil fluid made it totally disappear.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Pittsburgh, PA

Reviewed by Justin: space

Great product

Awesome oil. I have a 04 Dakota 4.7 with the dreaded lifter knock and after trying a few different things. I was recommended to try some amsoil products and I will never go back to anything else. Gave my motor a good feel and the tapping is very minimal, you can barely hear it in and it goes away after a second or two. Will always use amsoil products.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Havre de grace, md

Reviewed by MrBigWay: space

Great Performance Product

I have used Amsoi in all my vehicles sense it first came out, I notices a increase in fuel economy and performance.
I put it in the motor, Transmission and rear end of my race car and increased my ET by .5 seconds which is amazing
I also use it in my semi truck with the same results in mileage and performance

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Waldport, OR

Reviewed by Brando: space

Excellent Product

The wear protection is phenomenonal, the performance improvements are noticeable and the extended drain intervals are what make Amsoil my favorite product. I currently run this oil in a half ton (V8) and SUV (V8) which put between 30000-40000 miles a year each.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Saskatoon Saskatchewan,

Reviewed by Kilted One: space

Another Great Amsoil Product

Our 2015 GMC requires GM spec oil which Amsoil more than meets. Being a bit old school on oil changes I like the margin of a high quality synthetic because modern engines are under much higher stresses and heat than when I started driving and wrenching.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Redding Area,

Reviewed by Robb: space

Better than advertised

I have used Amsoil Signature since my vehicles were new. 2 of them have over 200,000 miles and the 3rd has over a 100,000. I have shortened drain ontervals to 12,000 miles and leak no oil in-between changes.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Lancaster, PA

Reviewed by SHUZAAM: space

The best product you could ever buy.

I use this product in my 2007 Chevrolet Cobalt.
When I first purchased my vehicle, it was absolutely not taken care of.
Along with a multitude of other mechanical repairs, I changed the oil that was in it, with Amsoil signature series motor oil,
Amsoil automatic transmission oil, and
brake fluid from Amsoil.
Boy, I tell ya. When you take care of your vehicles and use Amsoil motor oil and products, the performance of your motor gets a boost.
I've noticed it runs way better, and lasts way longer.
It keeps my engine healthy, and I'm always sharing the experience with others.

I also used the European synthetic on my girlfriends beetle, which was production condensation of oil on and around the oil cap and fill hole.
The engine was burning it up, and there was a leak that was found by a rinky dink shop.
I put in some Amsoil hoping it would fix the issue.
Of course, it always proves itself.
Healed up all the gaskets and stopped the leak.
She didn't have to fill up every 2 weeks anymore, and her engine is running even better.

BUY AMSOIL PRODUCTS PEOPLE

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | California,

Reviewed by Prius: space

Hybrid with Amsoil

Use this in my Prius Hybrid and gained 1.3 miles per gallon. The added protection of Amsoil in my engine gives me a great peace of mind.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Buchanan, Mi

Reviewed by Larwel: space

Will buy this again

Use it in my Corvette C6

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Texas,

Reviewed by Doug: space

Good stuff

Not much to say, really. I'm pretty sure the main ingredient is awesome sauce, though. I won't put anything else in any of my ICE-powered vehicles. If Amsoil could make electrons, you know e-cars would go faster.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Central California,

Reviewed by HHR Man: space

good stuff

I have used Amsoil for years in several different vehicles and have found the product to be superior to the other products that are found in stores. I have had comments about how well my vehicles have run while using your product.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Medfield, Ma

Reviewed by Moto Man: space

Good Stuff

I use Amsoil in the car, my motorcycle, and in any other engine I may possess. I am not brand loyal except when I find a product that is so superior that no comparison exists.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Portland OR,

Reviewed by Nick: space

Been using for years

My dad started using Amsoil in the 1980's and when I started driving in he mid 90's I started using it too. Never had any issues and I always beat on my vehicles. Excellent oil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Ridgeville, SC

Reviewed by J.P.: space

STILL RUNNING STRONG

i have used amsoil in my 2002 chevy avalanche with a 5.3 liter engine. i have 140,000 miles on the engine and oil consumption is less than a pint every 8,000 miles. i also use amsoil in my wifes 2003 chevy trailblazer, it has 121,000 miles and does not use any oil. i go 8,000 miles between oil changes.
i also use amsoil synthhetic transmission fluid in both vechiles.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | cottonwood, az.

Reviewed by bgdv1: space

Excelent product

I run the 5W-30 in my Tacoma, my wifes Legacy and our sons 4Runner. I also run all Amsoil oils in our 2 Harley Davidson motorcycles.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Butler, Pa

Reviewed by brian: space

great product

after 1 year oil is in better shape in color and overall viscosity that conventional oil i use the recommended amsoil filter with cold winters and hot summers pulling a boat of 5000 saves me money only changing once a year instead of 3 with regular oil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | montreal canada,

Reviewed by Tim1457: space

I wouldn't use anything else.

I started using Amsoil in 2011. I talked to several people at work that used Amsoil products and we're very satisfied with it. I got a dealer at work to order the Signature Series for my Tundra. Well, 5 years later, I'm still using it and still loving it. I've also used the transmission fluid and products for my ATV. I'm sold on Amsoil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Aiken, South Carolina

Reviewed by Ewan: space

Worth every penny.

Title says it all. I bought this for my first oil change on my 2015 Ford Focus ST. I'm now on my second oil change using the same product. My engine oil temps run consistently 15-20 degrees cooler than before. Will never go back to another brand again.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Oregon,

Reviewed by trigama3: space

Less down time on service vehicles

Retired my 1994 Toyota xtra cab 4 cyl, 5spd pickup in 2014 with 267,000miles.
Started using Amsoil around 70,000 miles because I got tired of changing oil every month. Never burned oil.
Truck had a full load with it in the entire time I used it. Worked that motor hard.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Phx, Az

Reviewed by Neil: space

Yes

I use this in my 08 Pontiac G8 it works good I like better then going to the auto parts oil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Discovery bay,

Reviewed by KeniceThe Menice: space

I put Amsoil in all my vehicles.

I have ran Amsoil in my diesel truck since 2008 and converted my girlfriends gas truck over about two years ago. I like reading about the testing done comparing Amsoil products to other companies products. I feel like Im using the best oil out there. Soon my 70 Chevelle will run Amsoil too.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Wayland, MI

Reviewed by Joshua: space

I will buy again

I works well in my dakota and have used only amsoil in my ruck for the last 100k I have @190k on it now

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Wisconsin,

Reviewed by DJ cars my passion and hobby: space

best oil going

use amsoil in my 2000 corvette (135,000 mi), 2002 325 bmw (140,000 mi) and my 1956 chevy 210 with a 355 stroker hardly any miles but really like the Z-rod oil. Been using amsoil for 8-10 years and to date no engine problems. will continue to use their product till I'm grounded from owning a vehicle.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | melbourne Florida,

Reviewed by Brand: space

Excellent oil

I've tried other oils, this by far is the best. Less consumption noticed, stays cleaner longer. There is a difference, I've tried them all, in motorcycles and trucks, this is by far the best in my opinion!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Az,

Reviewed by Tedd: space

Product as well as services are impeccable!

I've been using Amsoil products for years so I am aware of the guilty and value, but what always surprise me, and I don't why by now, is the fact that they are usual at my door in 1 or 2 days. Fantastic shipping for me. I appreciate that greatly. Thank You Amsoil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Jacksonville Fl.,

Reviewed by Dick: space

Signature Series 5W-30

I have used this in my Toyota pick-up for 11years and the engine is like new.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Fort Collins, Co

Reviewed by JW: space

Signature series full synthetic 5W-30

I have been using this oil for over 20 years in all my vehicles. It is by far the best motor oil I have ever used. I started using in my 1996 Chevy pickup. The garage had to replace an intake manifold gasket. They ask me if I had cleaned the engine before bringing it in. I said no, they said the engine looked brand new inside, it had absolutely no carbon build up. That was amazing since the truck had 158,000 miles on it. You can't go wrong by using this oil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Schulenburg Tx,

Reviewed by Duck Killer: space

GMC 2009 sierra

I ran this oil on the 15,000 mile program because I'm on the gas pretty heavy at times. The first cycle went well, but the next cycle I pulled my trailer a lot and the oil was history at 6,000. Truck also had lifter tick at start up when motor was already at running temp. Went back to conventional oil and lifter tick was gone.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Yuba City,

Reviewed by Vladimir: space

Amsoil Superior Quality

I come from the old school that good quality oil is always cheaper than rebuilds and parts replacement. I have been using Amsoil products for over 20 years and the results have been outstanding. They provide the best protection against wear keeping the powertrain in outstanding clean and excellent conditions for many, many trouble free miles.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Georgia,

Reviewed by Skip: space

The best synthetic oil on the market.

I've been using Signature series 5w-30 for over twenty years and will use no-other because it simply continues to be the best available synthetic motor oil on the market.
The mechanic I use puts it into my engine, transmission, radiator, and differential.
I have a total of over one hundred thousand miles of trouble free driving on my vehicles.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Oregon,

Reviewed by Jerry: space

Retire aircraft mechanic. I know synthetic oil.

I use AMSOIL like aircraft owners use engine oil on their planes. Auto owners change oil and filter every 3,000 miles or 3 months witch ever come 1st. With AMSOIL I change oil every 10,000 miles and filters every 5,000 miles. Easy to remember and cheaper than 3,000 mile or 3 months. Tell your wife not to nag you about oil change until she nears that 10,000 mile mark.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | N Carolina,

Reviewed by None: space

Nothing but the best

I have used Amsoil for 20+ years. I collect classic Mustangs and only the very best products are used on them. I also use Amsoil in my 2006 Silverado. My wife just bought a 2016 Buick and Amsoil will go in at its first oil change. I've never had a lubrication mechanical failure .

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Norwood, North Carolina

Reviewed by Huffy: space

I do buy this product again & again

I use this in my cars from brand new!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Bonita Springs, Fl.

Reviewed by Cliff: space

Signature Series 5W30 stays cleaner than any oil I've used.

I have used Amsoil for several years in just about all of my vehicles. The only one I do not use this oil in is an old 69 VW that leaks from time to time. For any other vehicle, old or new, I highly recommend Amsoil Sigature Series. I save about $100 a year per vehicle on oil changes. Once a year oil changes save a lot of time too. I've never had any issues mechanically with the extended oil changes.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Seneca, MO

Reviewed by Dan: space

Extended Drain, Extended Value

I have always used high quality synthetic oils in all of my cars (daily drivers) because I believe it pays off in reduced engine wear. The Amsoil Signature Series is on par, if not a notch above the other oils I have used in terms of performance.

What sets this apart from the competitors is the extended drain interval. Since my car is turbocharged, I follow the heavy duty recommendations (15k) with a filter change per Chevy's instructions (7.5k). This saves me time (cartridge filter takes 2 minutes) and money versus an oil with a standard drain interval. It would save even more in a vehicle that can follow the 25k drain. Even at the end of the 15k, I don't notice any decrease in performance, but I change it anyway.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Mays Landing, NJ

Reviewed by Rascal1101: space

Simply the best.

I have been using Amsoil products over 20 years now and have been pleased with all the performance and durability aspects.
Have used the Signature blend oils in many cars for the extended drain intervals and have never experienced any failure, wear or usage problems.... period.
Why would I use anything else?

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Wichita, KS

Reviewed by Mxmantc87: space

Best oil for your vehicles

I've used amsoil in all of my dirt bikes for 10 plus years every new top end build the engines have been spotless. I just recently started using amsoil in my vehicles and so far I'm blown away on how good the oil is even on changing its not black and thick like other oils I have used. I change my oil in my cars every 15 thousand miles with this oil it's good up till 25k but I just do it out of peace of mind. If you have never used amsoil I recommend you give it a shot. I'll never use any other oil in my vehicles or dirt bikes except amsoil

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Hawaii,

Reviewed by WOMPUS: space

The only oil I've used since the mid 70's

I use the 5W30 in 2 of my cars, 1 Chevy truck, and 2 Street Rods.
In fact I use Amsoil in everything from my air compressors to my boats.
Never thought of using any oil but Amsoil since the mid 70's.
I'm a walking advertisement for Amsoil... great oil, in fact I just turned 325,000 miles on my motorcycle, if that isn't proof of Amsoil then I don't know what is!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Gainesville, Ga.

Reviewed by Tim: space

Yes I would buy this product again

I am fully satisfied with my product especially the fast delivery

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Bettendorf Iowa,

Reviewed by Scott: space

The best oil I have ever used.

I use this oil in my 2012 Nissan Rogue and my wife's 2011 Nissan Juke (Has a Turbocharger in it). I love being able to go 15,000 miles/1yr to do an oil change. Saves me money and I don't have to make time 3-4 times a year to make an appointment for an oil change. It may cost more upfront for the oil and filter but it is cheaper by the end. Figure at least $20-30 per basic oil change multiply that by 4 times a year, you just spent $80-120 for 4 oil changes in that one year, for a basic oil change at every 3,000 miles.
If you get this Signature Series and a Ea filter you can go 15,000 miles. You get and extra 3,000 miles or one less oil change. You just saves money right there.
If your vehicle has a Turbocharger in it, you must use Signature Series. The engines get way to hot for the basic cheap oil.
Even if you get free oil changes from a dealership, they use basic or synthetic blend oil, and most likely and unknown or cheap oil filter. Do you want to put cheap stuff in your vehicle? I don't.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Shortsville, NY

Reviewed by Ryan: space

Best Synthetic Oil.

I've used the Signature Series 5W-30 in my Nissan Titan for over eight years and have never had a single oil-related issue, even when pushing my truck to the limits.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Salt Lake City, UT

Reviewed by Satisfied: space

Amsoil Is The Best!

I've used Amsoil products now for about twelve years.
After a year, the drain oil is not much darker than it was when it went in.
I put about 1000 miles per month on my truck (2014 Xterra).
Previously, I drove a 2001 4Runner similar miles.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Jackson, MS

Reviewed by PM: space

Overpriced

Your product have become overpriced and shipping prices are out of control, can't imagine if I wasn't A preferred paying customer...

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | S.I.N.Y,

Reviewed by M.L.: space

Great oil

I use this oil in my 2011 and 2005 Silverados. Never had any trouble with 120,000+ miles on both of them.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Silsbee, Tx

Reviewed by Lucky: space

Love amsoil

I use amsoil in everything I own bikes quads vehicles ect. I use this in my 2012 Silverado trucks seams to preform better with this rather than the mobile one I was using before

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Oklahoma,

Reviewed by Derek: space

The Best

As long as Amsoil is in business I will not buy another oil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Discussion Url | Perth, Ontario

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