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Extended Life 10W-40 Synthetic Motor Oil (XLO)

 10W-40 Synthetic Motor Oil (XLO)
Product Code: XLO • Brand: AMSOIL

AMSOIL XL Synthetic Motor Oil is the choice for those who want to do something extra for their vehicle. Its boosted formulation delivers extra cleaning power, outstanding wear control, excellent high and low temperature protection and exceptional fuel economy. XL is engineered for advanced automotive technology, including turbos and direct injection. It is packed with extra engine protection, allowing you to go up to 12,000 miles / 19,000 kms or one year, whichever comes first, between oil changes.

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)
30-Gallon Drum
55-Gallon Drum

See Pricing or Place an Order
MSDSData SheetFrench Data Sheet

Product Details

Product Applications

Use AMSOIL XL Synthetic Motor Oil in applications that require any of the following specifications:

Product Application Specs

XLO 10W-40 Synthetic Motor Oil

• API SN, SM
• ACEA A3/B3, A3/B4

Product Description

Motorists, business owners and fleet managers benefit from the boosted engine protection of AMSOIL XL Synthetic Motor Oil. Frequent oil changes are expensive, time-consuming and inconvenient. The extra protection built into XL can provide extended drain intervals up to 12,000 miles / 19,000 kms or one year, if you choose, allowing you to change oil on your schedule, reduce maintenance, save money and reduce waste oil.

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.

Resists Oil Breakdown

XL Synthetic Motor Oil maintains its fluidity (viscosity) under the most extreme conditions. Some oils break down and significantly increase in viscosity after extended periods of high-temperature operation. These changes can cause excessive oil consumption, engine deposits, accelerated wear and difficult cold-starts. The GM Oxidation and Deposit (GMOD) Test consists of a 5.7L V8 engine running at 293°F (100° hotter than normal) for 100 hours. These severe operating conditions test an oils ability to control viscosity increase, deposits and oil consumption. The testing revealed that AMSOIL XL Synthetic Motor Oil provides 64 percent more protection against oil breakdown1 than required by the GM dexos1® Gen 2 specification, ensuring protection in extreme temperatures.

GM Oxidation and Deposit Test Results

Protects Pistons from Low-Speed Pre-Ignition (LSPI)

XL Synthetic Motor Oil features unique chemistry proven to protect your engine against the harmful effects of low-speed pre-ignition (LSPI). LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. Most new engines feature gasoline direct-inject (GDI), often coupled with a turbocharger. These technologies heighten the possibility of LSPI events, which can destroy pistons and connecting rods. A properly formulated motor oil is critical for protecting your engine against LSPI.

Original equipment manufacturers (OEMs) like GM have addressed the issue by designing tests to determine a motor oil's ability to prevent LSPI. XL Synthetic Motor Oil achieved 100 percent protection against LSPI2 - zero occurrences were recorded throughout five consecutive tests.

Keeps Engines Clean

AMSOIL XL Synthetic Motor Oil is fortified with detergent and dispersant additives. Its boosted additive package effectively raises the total base number (TBN) to neutralize acids and resist sludge, corrosion and carbon deposits. XL provides 25 percent more cleaning power3 to help keep your engine running smoother, longer.

Hot and Cold-Engine Protection

AMSOIL XL Synthetic Motor Oils are multi-viscosity formulations. Compared to conventional oils, they better resist the effects of thermal breakdown, including evaporation and viscosity loss, while remaining fluid in cold temperatures for easier cold starts and fast start-up circulation.

Maximizes Fuel Economy & Maintains Low Emissions

XL Synthetic Motor Oil is licenced by the American Petroleum Institute (API) to meet and exceed the requirements commonly found in owner's manuals. It excels in fuel-economy testing, earning the additional "Resource Conserving" designation4 from the API. XL is also friendly toward modern emissions control systems, promoting proper operation of catalytic converters for optimum service life and low exhaust emissions.

1 Based on independent testing of AMSOIL XL 5W-30 motor oil in the GMOD engine test required for the GM dexos1 Gen2 specification.

2 Based on zero LSPI events in five consecutive tests of AMSOIL XL 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.

3 vs. AMSOIL OE Motor Oil

4 Applicable to XL 0W-20, 5W-20, 5W-30 and 10W-30 motor oil.

All trademarked names are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

COMPATIBILITY & MIXING AMSOIL

AMSOIL XL Synthetic Motor Oil is compatible with conventional and other synthetic motor oils. Mixing other oils with AMSOIL motor oils, however, will shorten the oil 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 XL Synthetic Motor Oil.

TECHNICAL SERVICES

For immediate answers to your technical questions call (715) 399-TECH (8324) between 8 a.m. and 5 p.m. Central time or email tech@amsoil.com.

SERVICE LIFE

In gasoline-fueled vehicles, AMSOIL XL Synthetic Motor Oils are recommended for up tp 10,000-mile/six-month oil change intervals or longer when recommended in owner's manuals or indicated by electronic oil life monitoring systems. Change aftermarket, original equipment manufacturer or AMSOIL Ea Oil Filter at every oil change.

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 XLO.

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

Technical Data

TYPICAL TECHNICAL PROPERTIES
AMSOIL XL 10W-40 SYNTHETIC MOTOR OIL
10W-40
(XLO)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)15.7
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)103.4
Viscosity Index (ASTM D-2270)162
CCS Viscosity, cP @ (°C) (ASTM D-5293)5315 (-25)
Flash Point °C (°F) (ASTM D-92)238 (460)
Fire Point °C (°F) (ASTM D-92)258 (496)
Pour Point °C (°F) (ASTM D-97)-44 (-47)
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)5.1
High Temperature/High Shear Viscosity
@ 150°C and 1.0 X 106 s-1, cP (ASTM D-5481)
4.4
Total Base Number (ASTM D-2896)10.0

Related Videos

LSPI Super Knock Prevention


 10W-40 Synthetic Motor Oil (XLO)

Did this product meet your expectations?

(click on a star to vote)

Product Name: Extended Life 10W-40 Synthetic Motor Oil (XLO)
Current Rating: 4.95out of 5 stars
Votes & Reviews: 19 vote(s) and 47 user reviews.


A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Thomas: space

Great product, fast shipping

Love this in my truck, only having to change it once a year is awesome.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JS: space

Good product

All my vehicles run on Amsoil. Just something you do if you want them to last.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jim the runner: space

The good stuff!

This oil is the best for my tutored car! You can really fell the difference ans see in the gas mileage!

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jean!: space

Been using for years,and always recommend Amsoil

Very easy to look up vehicle or toy. It's very convenient for me to order oil and filter and send it to the house.I use it in all my vehicles also my sons trucks.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JT: space

Outstandingly oil

I use amsoil in everything, it has unbeatable protection and as a preferred member it comes at a great value

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeep: space

I have used Amsoil in all of my gasoline powered vehicles

The XL gives me another choice. New vehicles get the premium oil but older,lower useage cars can use the XL

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Duro: space

I will but again

Excellent oil for those looking for a bit more protection that regular oil. Excellent in high milage vehicles especially.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Damian: space

I am a member

I am glad that ams oil asked. I drove my car 12,000 km in 7 months with the same oil and in top of that there were minus 24 celsius degrees outside, job well done.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TDR: space

Only oil

This is the Oil I use to put in the other 3 family Kias . 2 collage kids and wife's Sorento . One spotage turbo and one non . The mileage intervals help poor ol dads pocket book .

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Brandon: space

I will always buy amsoil

I use there motor oil in my 454 in my 92 suburban along with there fluids in my diffs. Eventually will be switching to the trans fluid too. And I run it in our kia made the engine run alot quieter then the factory oil

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by B-rock: space

what I expect from amsoil

It's a great product that I know I can depend on. I use this in my work truck. Even with the extended mileage I know it's a product that I can count on to take to the limits.
Thank you amsoil

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Doug: space

Amsoil XL

I've been using Amsoil for 12 to 14 years now and have never been disappointed by the product. I use Signature in my Jeep and XL in the rest of my families 2 or 4 cycle motor driven machines. 6 cars, 1 motorcycle, 3 lawnmowers, 2 chainsaws, 3 weed eaters and 2 generators.
I could go on, but just say "I have a lot of trust in AMSOIL."

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ryoko: space

I Love Amsoil

I started using Amsoil in 2000 when the garage I started working at sold it,haven't used anything but since then. It's a wonderful product and I love the longer service intervals for an oil or tranny change especially since I don't have a lift at home

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by koz: space

5w20 extended range oil

My vehicles run better, the engines are clean

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Serge: space

Only the best!

Got this for my 2007 Pontiac Solstice 2.4L that's been turbocharged with a custom K04 turbo kit. Engine runs great!

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by James: space

For a Chevy Equinox and would buy again

Good for the car and helps milage

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Hammer: space

Medicine for my Mark LT

Have been using Amsoil in the Mark LT since 2006 and it has 130,000 miles and engine is good and does not use or leak oil.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bert: space

I will keep buying this product.

I've used this product for about a year now and the intervals between oil changes continue to grow. I use my trucks gauge to see when it is needed. First couple of times I didn't really notice a difference. Now I'm on my fourth oil change and it has really made a big difference in the mileage between the last change. Great product. Keep it coming.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Emanuel: space

Great product

Exceeded my expectations

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ron: space

I would use AMSOIL in every engine

I started using Amsoil in my '84 Volvo at around 150,000 miles.
I drive the car about 70 miles a day, hard use.
I spend far less time doing oil changes and I almost never have to add oil.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Welby: space

Amsoil saved me from expensive engine repairs!

Ok, I am an Amsoil customer for life... Seriously! In February when it was still wicked cold here in Maine, I was having some engine starting and idling problems with my SUV when the overnight temperatures were 15F and colder. The engine would default to a safe "limp home" mode, and I was facing some expensive engine overhaul costs. My mechanic was very sure the symptoms had to do with dirty cam phasers. He suggested using Amsoil Engine and Transmission Flush to clean the engine (including the cam phasers) and switch to Amsoil Signature Series Synthetic Oil. I followed his advice and the results have been AMAZING! After the treatment I have had zero starting problems. And even better, the rattling sound that I thought was the water pump turned out to be the timing chain... no more noise! The Amsoil Engine Flush and motor oil solved both problems and they have given my 135K mile engine new life. I plan to treat all of my vehicles with these Amsoil products, and that includes the transmissions as well. If that wasn't reason enough to use Amsoil products, when I made my first purchase I decided to register as an Amsoil Preferred Customer. I saved much, much more than the registration fee over the cost of Amsoil products at the local auto parts store on that first purchase alone. Engine problem solved and low prices equal CUSTOMER FOR LIFE!! Thanks Amsoil!

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by cheyfinn: space

yes, i have used AMSOIL for over 30 + yr's

car, truck, motorcycle & snow blower and lawn mower

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tom: space

Impressed !

I had heard about Amsoil and reviewed their data and wondered how much was real and how much is just advertising. Then I bought a new truck and thought to myself that I'm really going to have to take care of this thing because I probably wouldn't be able to buy another one in this lifetime due to cost and old age. If the data I had seen was accurate than Amsoil was the direction I needed to go for protection. I used the factory oil for 4900 miles then made the switch to Amsoil. So far I'm very pleased. Most notably with the fuel economy. I've gained 1.5 to 2.0 MPG in highway driving. That to me is impressive. I'm sold.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Using the XL Series

The latest price increases of the Signature Series Motor Oil no longer make that oil the bargain it used to be. I find using the XL Series the same as far as mileage goes and the increased protection over the OE Series gives me more peace of mind.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Why use XL

I have full confidence in Amsoil motor oil. SInce I change oil more frequently and the price of the Signature Series has become extremely high, I find the XL series to be a better bargain.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by john: space

type of oil

I would not purchase it if I did not think it was the best product out there. thanks

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Davidh82: space

Great stuff

I have 3cars (one older corvette), 1 truck, 1 boat, and one Harley Davidson. I use Amsoil in all of them. My last truck I traded in had over 300,000 miles on it. Dealer commented "wow , this truck still runs great". all my vehicles run quiet with very little mechanical problems due to engine wear. I wouldn't think of using any other oil in my vehicles.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gio: space

Best oil by far!

I use this oil on my 17 camaro ss and by far the best oil I've used! I put it in all of my 5 cars now and I wouldn't use any other brand from now on.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ferdy: space

Extend your oil change intervals!

Love this product! My 200,000 plus mile Grand Cherokee is still going strong and getting 19 mpg. If your concerned about the added cost, don't be, with the extended change intervals you will save money in the long run! I will be changing my new wrangler to Amsoil as soon as it need fluid changes.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Groundpounder: space

I only use the best

My pony car and h d scooters perform the best and run the coolest

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Norkat: space

I will purchase this product.

I will buy this product everytime my friends and family requires it. All of AMSOIL products is what I will use on everything that I own.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Scooter: space

Best Oil I've Have Ever Used

Best Oil I have ever used, and if you don't believe me read the specs. Best service and tech savvy.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Runky: space

So far, so good

Using this for the first time. I've used amsoil for many years; usually the signature series but I'm trying the XL because I don't put a lot of miles on any specific vehicle I own. It seems to be a good alternative with a little break on the price.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Big chris: space

Best oil I have ever used and will continue.

Car runs smooth and quietly. You can feel the difference. I recommend Amsoil to all I meet.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bear: space

I have been using this product for years --

I use this product on a Chevy truck and a GMC truck both trucks run great and smooth and i do believe this oil helps with fuel economy

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Samurai Z: space

I will always use AMSOIL in my vehicles.

AMSOIL makes oil changes well worth it. I know they upped their change intervals, but I still change my oil every 10k miles. When I do the oil change, it almost seems like I should be following their new interval suggestion. The oil after the amount of use is darker, but it's still very fluid and not thick like other oils I've used before AMSOIL. I use their filters along with the XL oil and it is the perfect combination. I thank AMSOIL for some of the best products.

Item Reviewed: XL Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Patch: space

Makes other oils obsolite

I have used this product for several years. I now have 240000 miles on my 1996 Ford ranger Ranger. I change oil before my annual Archery elk hunt, and add a bottle of PI. Easy as eating Pie and Ice cream.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rbfrfghtr: space

I have been buying this product for years.

I have use this in my last three vehicles and I will keep using it.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Sambo: space

Use it everyday

In trucks cars,motorcycles, lawn mowers

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andy: space

Best Synthetic for High Mileage

My car has over 385,000 miles, and convinced this motor oil a major reason its still going strong. This oil has a higher viscosity than other synthetics I've tried, which allows me to use a good synthetic for thermal protection, yet prevents minor leaks typical for high mileage cars.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TimU: space

Good oil, but could be better

I was told by the Northstar project manager at GM to use this weight oil in my 2002 Cadillac DTS. After 250000 miles I've had no problems and she still runs like new.
My only complaint is this weigh of oil isn't offered in your Signature series. Wonder why?

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Burningwell: space

nothing but the best

I have been using Amsoil products for over twenty five years in all my vehicles and have never had a problem related to poor lubrication.I have never purchased a new car in my life and routinely run up over 200,000 miles on whatever I'm driving.I think that say's it all. Frank

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mark: space

Will always use this product!

Use this in my old Chevy 454 powered motorhome. This motor really works hard and gets Hot. Oil pressure stays up on hottest days and no leaks or oil burning. It's the best protection for my motor that
I can find.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by BogusRacing: space

200,000 miles

Amsoil 10w-40 in my F150 with 200K miles in her and still runs like new

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by n/a: space

The only lubricant products.

Amsoil has been the only choice in lubricants since 1985, what else needs saying? Multiple BMW motorcycles, my wife's 2000 F150 with many miles, a couple of Suzuki Sidekicks, both high mileage with routine maintenance only. Enough to convince even those with little automotive knowledge.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by DEREK: space

Happy, happy, happy

This was purchased for a co-worker. He spoke to me about using the products and I explain how there was no better in the market. He is very happy and I feel will be returning for all his lubricate needs.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by John C: space

I will always use AMS oil

I am 71 years old in my second childhood. I have used every kind of oil in my life time. I personally will never use any other oil in my special car other than AMS. I bought a 2013 SI Honda Civic and I put a supercharger, different exhaust and had it dyno tuned and much more. Results over 300 HP to the wheel. I fell safe using this oil up to 6000 miles but I change at 30% not 15%. If you use this oil in your car you will never change to any other. I guarantee that.

Item Reviewed: Extended Life 10W-40 Synthetic Motor Oil (XLO)
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