AMSOIL 10W-40 100% Synthetic Dirt Bike Oil

AMSOIL 10W-40 Synthetic Dirt Bike Oil is engineered to improve dirt bike performance and rider experience. It is designed to provide 'friction durability', ensuring a consistent clutch feel whether racing or riding through challenging trails. The oil's advanced chemistry promotes outstanding engine reliability, allowing worry-free operation under severe conditions. Ideal for dirt bikes requiring 10W-40 motorcycle oil, it is suitable for brands like Honda, Yamaha, Kawasaki, Suzuki, and Husqvarna, and is recommended for separate-sump applications such as Honda CRF and many two-stroke dirt bikes. The oil's properties help protect gears and resist heat, contributing to its performance and durability in demanding dirt bike applications​​​.

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This AMSOIL product is available in:

Individual Quart Bottles
Cases of 12 Quart Bottles
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Product Code:

DB40QT-EA

AMSOIL AMSOIL 10W-40 100% Synthetic Dirt Bike Oil Description

AMSOIL 10W-40 Synthetic Dirt Bike Oil is engineered to improve dirt bike performance and rider experience. It is designed to provide 'friction durability', ensuring a consistent clutch feel whether racing or riding through challenging trails. The oil's advanced chemistry promotes outstanding engine reliability, allowing worry-free operation under severe conditions. Ideal for dirt bikes requiring 10W-40 motorcycle oil, it is suitable for brands like Honda, Yamaha, Kawasaki, Suzuki, and Husqvarna, and is recommended for separate-sump applications such as Honda CRF and many two-stroke dirt bikes. The oil's properties help protect gears and resist heat, contributing to its performance and durability in demanding dirt bike applications​​​.

Synthetic Dirt Bike Oil

Designed to Improve the Performance of Bike and Rider

AMSOIL Synthetic Dirt Bike Oil is 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, rider scan feel confident their clutch will perform from start to finish. AMSOIL exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions.

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 choice of professional riders and weekend warriors everywhere.

AMSOIL 10W-40 100% Synthetic Dirt Bike Oil
  • Delivers confidence in clutch feel
  • Protects against gear, bearing& piston wear
  • Maximizes horsepower
  • Helps extend clutch life

Delivers Confident 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.

TYPICAL TECHNICAL PROPERTIES

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

Kinematic Viscosity @ 100°C, cSt (ASTM D445) 14
Kinematic Viscosity @ 40°C, cSt (ASTM D445) 86.4
Viscosity Index (ASTM D2270) 167
Flash Point, °C(°f) (ASTM D92) 240(464)
Fire Point, °C(°f) (ASTM D92) 270(518)
Pour Point, °C(°f) (ASTM D97) -40(-40)
NOACK Volatility, % weight loss (g/100g) (ASTM D5800) 4.8
High-Temperature/High-Shear Viscosity (ASTM D5481), cP 4
Four-Ball Wear Test (ASTM D4172), Scar, mm 0.57
Foam (ASTM D5182 Sequence I, II and III) 0/0,20/0,0/0
Total Base Number (TBN) (ASTM D2896) 7.6

RACING IS RESEARCH™

AMSOIL Synthetic Dirt Bike Oil underwent extensive on-track testing in the bikes of professional riders. A combination of racer feedback and lab testing allowed us to fine-tune AMSOIL Synthetic Dirt Bike Oil for outstanding wear protection and consistent clutch feel – benefits riders demand.

APPLICATIONS

Use 10W-40 Synthetic Dirt Bike Oil in dirt bikes that require 10W-40 motorcycle oil, including those made by Honda, Yamaha, Kawasaki, Suzuki and Husqvarna. Recommended for separate-sump applications, including the Honda CRF and many two-stroke dirt bikes. JASO MA; API SG, SJ, SH, SL.

Use 10W-50 Synthetic Dirt Bike Oil in dirt bikes that require 10W-50 motorcycle oil, including those made by KTM, Kawasaki, Yamaha, Suzuki and Husqvarna. JASO MA; API SG,SJ, SH, SL.

Use 10W-60 Synthetic Dirt Bike Oil in dirt bikes that require 10W-60 motorcycle oil, including those made by KTM and Husqvarna. JASO MA; API SG, SJ, SH, SL.

COMPATIBILITY

AMSOIL Synthetic Dirt Bike Oil is compatible with other synthetic and conventional motor oils. Adding other oils, however, will shorten the life expectancy of AMSOIL motor oils and reduce their 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 Dirt Bike 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

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

AMSOIL PRODUCT WARRANTY

AMSOIL Synthetic Dirt Bike Oil is Warranty Secure, keeping your factory warranty intact. AMSOIL Synthetic Dirt Bike Oil is a high-performance replacement for vehicle manufacturer-branded products and is also backed by the AMSOIL Limited Warranty. For complete information visit AMSOIL.com/warranty.aspx.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available at AMSOIL.com or upon request at 715-392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.

AMSOIL 10W-40 100% Synthetic Dirt Bike Oil Reviews

5

star rating

Amsoil 10w-40w 100% Synthetic Dirt Bike Oil

I have been using Amsoil products for several years with great results.

5

star rating

Great oil

I've used this over 2 years now never had issues with my clutch slipping

5

star rating

Great oil, Great deal

Been a long time Amsoil user and recently purchased a used '08 Kawasaki KLR. Don't trust the motor to any other oil.

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