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Synthetic SAE 10W-40 Dirt Bike Oil (DB40)

 Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
Product Code: DB40 • Brand: AMSOIL

Designed to improve the performance of bike and rider.

Engineered to deliver the performance attributes most requested by on - and off-track dirt bike riders, including consistent clutch feel. Consistent clutch feel is the result of 'friction durability', so whether deep into a race or deep in the woods, riders can feel confident that their clutch will perform from start to finish. AMSOIL exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions.

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)

See Pricing or Place an Order
MSDSData Sheet

Product Details

Product Applications

10W-40 Synthetic Dirt Bike Oil: recommended for Honda®, Yamaha®, Kawasaki®, Suzuki®, Husqvarna® and other dirt bikes where 10W-40 motorcycle oil is used. Recommended for separate-sump applications such as Honda CRF, and many two-stroke dirt bikes.

Product Application Specs

  • API SG, SJ, SH, SL
  • JASO MA

Product Description

AMSOIL INC., the premier manufacturer of synthetic motorcycle lubricants, focuses on improving lubricant performance so riders can focus on improving their performance on the trail or the track. That's why AMSOIL is the Official Oil of Monster Energy Supercross, AMSOIL Arenacross, AMSOIL GNCC and the AMA Amateur Nationals.

Delivers Confidence in Clutch Feel

AMSOIL Synthetic Dirt Bike Oil's superior friction-durability properties help minimize clutch slippage, fade and chatter, giving riders consistent clutch feel during takeoffs or when maneuvering around obstacles on the trail. In an extreme simulated-start test, AMSOIL Synthetic Dirt Bike Oil continued to deliver consistent clutch feel following 32 simulated race starts, while a leading original equipment manufacturer (OEM)-branded oil demonstrated inconsistent clutch-lever action and poor clutch feel after 16 starts.

The clutch plates lubricated with AMSOIL Synthetic Dirt Bike Oil remained clean and in good overall condition, while the plates using the OEM oil revealed discoloration and wear. AMSOIL Synthetic Dirt Bike Oil's superior performance helps instill in riders the confidence that their bikes will perform consistently in all types of riding conditions.

Protects Against Wear

AMSOIL Synthetic Dirt Bike Oil withstands high-rpm operation, extreme heat and mechanical shear. Its synthetic base oils naturally resist viscosity loss and provide a protective film against wear to gears, bearings and pistons. Its anti-wear additives provide an extra measure of protection, promoting long component life to help riders get the most out of their bikes.

• Delivers confidence in clutch feel
• Superior protection against gear, bearing & piston wear
• Maximizes horsepower
• Helps extend clutch life

Extreme simulated start test for clutch plate

RACING IS RESEARCH™

AMSOIL Synthetic Dirt Bike Oil underwent extensive on-track testing in the bikes of AMSOIL-sponsored professional riders on the GEICO/AMSOIL/Honda Factory Connection and Team Babbitt's racing teams. A combination of racer feedback and lab testing allowed AMSOIL to fine-tune AMSOIL Synthetic Dirt Bike Oil for outstanding wear protection and consistent clutch feel - benefits riders demand.

SERVICE LIFE

AMSOIL Synthetic Dirt Bike Oil should be changed according to the vehicle manufacturer's recommendations.

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 DB40.

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

Technical Data

TYPICAL TECHNICAL PROPERTIES
SAE 10W-40 Dirt Bike Oil (DB40)
Kinematic Viscosity @ 100°C, cSt (ASTM D445) 14.2
Kinematic Viscosity @ 40°C, cSt (ASTM D445) 93.5
Viscosity Index (ASTM D2270) 156
Flash Point °C (°F) (ASTM D92) 246 (475)
Flash Point °C (°F) (ASTM D92) 254 (489)
Pour Point °C (°F) (ASTM D97) -44 (-47)
Noack Volatility, % weight loss (g/100g) (ASTM D5800) 4.0
High Temperature/High Shear Viscosity @ 150°C , 1.0x 106 s-1), cP (ASTM D5481) 4.1

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 Synthetic SAE 10W-40 Dirt Bike Oil (DB40)

Did this product meet your expectations?

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Product Name: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
Current Rating: 5out of 5 stars
Votes & Reviews: 21 vote(s) and 20 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 johnny: space

amsoil is the most trusted

never disappointed use it in everything

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Charlie TUNA: space

Repeat on buying this oil!!

Grandson races his bike. And this oil seems to help and last longer!!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Dirtbike dude: space

Great product

Product allows us to run more hours on our KTM's before engine overhaul. Great product!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Dan: space

I use Amsoil

I have a lot of engines in different kinds of equipment and vehicles. I use Amsoil in everyone of them except my airplanes. Have been using Amsoil for over 30 years. If I live long enough I will use it 30 more. Great oil and great customer service.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Jonny O: space

Great product!!

Best oil around!!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Enduro: space

Good results

I switched my transmission oil after I was experiencing some clutch drag from my motorcycle once I switched the clutch drag issues were gone great product

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Srt: space

Top notch

I use this in all of our dirt bikes and atv's. Nothing but smooth running, shifting. The best.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 pro4100: space

Only Oil for me

I dont need to say anything. I am an Amsoil for life customer. Enough said!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Gc131: space

Great price and great product

I use this in my 2015 crf450 in both case sides. Works great in the engine and on the clutch side.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Weasel 247: space

Great product!

I used this in my 2007 CRF250R and now it the only oil I used since the first oil change on my 2016 CRF250R and sons 2017 YZ125

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Jay: space

I have ran this oil since i started riding/racing

This is by far the best oil i have ever ran in my bike. I have ran synthetic mobil 1 before this and the bike just didnt run as good when i put mobil 1 in there. Amsoil changed that. Thank you Amsoil!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Stanfill25: space

I will buy this again

I use this on my Dirt Bike and use amsoil on every motor I own

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 G: space

Quality lubricant

I've been riding,racing and maintaining dirt bikes and other motorcycles for over 40 years I have been using Amsoil in all my trucks and motorcycles for around ten years. I have never had a engine failure since moving to Amsoil from Pensoil I have a 2015 Suzuki rmz 250 that I trail ride and my son rides motocross on. I change the oil and filter every 6 hrs per manufacturer recommendations. No problems at all.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Rustdoc: space

Improved performance

I use this in the kids dirt bikes and side by side. The performance has been enhanced tremendously.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Ebear546: space

Lifetime user

Great product. Oil still looks good after 2-3 times longer change intervals in my KTM.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Tool Box: space

Great Product I would recommend it to anyone

I have been using Amsoil for years during my GNCC off road race seasons without an oil related failure. This year I'm running 10w 40w oil designed for dirt bikes. Four races into the season and no problems and clutch wear has been minimal. VEry good product

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Barry: space

10W40

Used in my son's KX 85. Great product with maximum protection while delivering incredible performance.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Lance: space

Definitely will continue to use Amsoil products.

Since changing to Amsoil my 2016 KLR 650 idles, runs quieter and much more smooth. It shifts more precisely and smoother. I noticed the idle RPM increased slightly. I am very pleased with the results.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 ANDREA: space

Great Product!!

We run this product in our dirt bikes and have had nothing but Great results!! As always Amsoil Rocks!!

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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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 Tracy: space

10W-40 Synthetic Dirt bike oil is all i run

I use this in my 2009 WR450F it is a great oil.

Item Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
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