Synthetic Dirt Bike Oil

Designed to improve the performance of bike and rider. 10W-40, 10W-50 and 10W-60

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 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 Official Oil of Monster Energy Supercross, AMSOIL Arenacross, AMSOIL GNCC and the AMA Amateur Nationals.

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Better Clutch Feel
Amsoil’s Dirt Bike oils improve clutch consistency!

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
Amsoil's dirt bike motor oils save clutch material under hard use
Clutch Wear

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.

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. JASO MA, API SG, SJ, SH, SL.

10W-50 Synthetic Dirt Bike Oil: recommended for KTM®, Kawasaki, Yamaha, Suzuki, Husqvarna and other dirt bikes where 10W-50 motorcycle oil is used. Recommended in place of Motorex® Cross Power 4T. JASO MA, API SG, SJ, SH, SL.

10W-60 Synthetic Dirt Bike Oil: recommended for KTM, Husqvarna and other dirt bikes where 10W-60 motorcycle oil is used. Recommended in place of Motorex Cross Power 4T. JASO MA, API SG, SJ, SH, SL.

*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.

Ordering: Pick up in the store at 4211 S. 84th St in Omaha or order online

10W-40 Ordering

10w-50 Ordering

10W-60 Ordering

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

AMSOIL products are backed by a Limited Liability Warranty. For complete information visit AMSOIL Warranty Information.


Why should people who have been using AMSOIL 10W-30 (MCT), 10W-40 (MCF) or 20W-50 (MCV) motorcycle oils in their dirtbikes switch to the new dirt bike family?

Although MCF/MCT/MCV works in dirt bikes, the new technology dials in the performance and marketing with a sole focus on dirtbike riders. The performance, emotion and perception are important in this market, and the new product family is designed to fulfill these needs.

What is the main difference between MCF/MCT/MCV and the new dirt bike oils?

 The formulas for MCF/MCT/MCV have not changed. The new dirt bike oils were designed to provide a clutch feel that is consistent throughout the life of the lubricant. The new dirt bike oil is formulated to allow for a more confident, consistent clutch feel. Extensive laboratory and field testing confirms a significant advantage in clutch operation, which is critical to dirt bike riders.

Why is AMSOIL launching a new product family for dirt bikes?

These products were introduced with new chemistry and labeling to establish a product family specific to the off-road market. Dirtbike rider’s desire oil made specific to dirt bikes and not a universal product for on- and off-road motorcycles. Dirt bikes are considerably harder on their clutches than street bikes. This new oil is able to focus on those key components such as wear protection and clutch performance.

What machines are these new dirt bike products specialized for?

The 10W-40 Dirt Bike Oil (DB40) is recommended for Hondas, Kawasaki’s, Suzuki’s, and Yamahas or any bikes calling for a 10W-40. The 10W-50 Dirt Bike Oil (DB50) is recommended for KTMs and Husqvarna’s in normal riding conditions or any bikes calling for a 10W-50. The 10W-60 Dirt Bike Oil (DB60) is recommend for the KTM Endure 690, as well as any KTM and Husqvarna models being ridden in more extreme and harsh conditions.

Can AMSOIL dirt bike oil be used in both sumps? (Honda)

Yes. If a bike is equipped with separate sumps, AMSOIL 10W-40 Dirt Bike Oil can be used in both.

What class of dirt bikes is this new oil designed for?

The new dirt bike oil is designed for 2-stroke transmissions and 4-stroke engines and transmissions, in MX, enduro, freeride, dual sport, trail, and competitive applications.

What is the drain interval for these newdirt bike products

Riders should follow the motorcycle manufacturer’s recommendations for drain intervals.

If you have any more questions please call 800-579-0580 or call the AMSOIL Omaha Motor Oil store at 402-933-3902

Customer Comments:

Best dirt bike oil on the market
By Bobby 1/25/2017

from DeLand, FL

I use the 10w 50 synthetic dirt bike oil in my KTM 350 SXF race bike. I have a rekluse clutch and with this oil, I can start the bike in second gear. With oils that I’ve used in the past, I was not able to start the bike in gear. In addition, I have a full season of two-hour woods endurance races on this engine with no sign of wear at all. I have friends with the same bike that use competitors oil that have already needed to rebuild both top and bottom ends. In my opinion, Amsoil 10W-50 dirt bike oil is the absolute best on the market!

How would you describe yourself?:
I’m a DIY handyman

What kind of vehicle/equipment do you have?:
2015 KTM 350SX-F

Bottom Line
Yes, I would recommend this to a friend


By Barry 1/19/2017

from undisclosed

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


By Barry 1/19/2017

from undisclosed

Use it in my KX450. I never have to worry about my bikes protection!


Great Product!!
By ANDREA 12/26/2016

from undisclosed

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


10W-40 Synthetic Dirt bike oil is all i run
By Tracy 12/20/2016

from undisclosed

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