Back

Close Icon

Main Menu

Your order may take longer than normal to arrive. We are experiencing extremely high demand and freight carriers are experiencing delays nationwide. LTL shipments are most severely affected.

10W-40 Synthetic Dirt Bike Oil

Product code : DB40QT-EA

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 their clutch will perform from start to finish. AMSOIL-exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions.
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.

10W-40 Synthetic Dirt Bike Oil



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 track. That's why AMSOIL is the choice of professional riders and weekend warriors everywhere.

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

Rings

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 AMSOIL 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.

*All trademarked names and images 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. All products advertised here are developed by AMSOIL for use in the applications shown.

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

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.

WARRANTY SECURE
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 details, visit www.amsoil.com/warranty/.

Warranty Secure

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended applications and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.

10W-40 Synthetic Dirt Bike Oil



10W-40 Synthetic Dirt Bike Oil

  • 5
    Quality oil
    By  NATE,  a  Verified Buyer  from  NW Washington  on  November 13, 2021

    Describe the issue

    I use in each of my 2 my 300cc TPI bikes. Great clutch performance, even with rekluse auto clutch. Cushions gear surface and makes shifting smooth as well as firm engagement.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Good lubricant
    By  GREG,  a  Verified Buyer  from  South Carolina   on  November 01, 2021

    Describe the issue

    I’ve ridden motorcycles since I was five years old. I’ve used several of the main brand oils when I raced motocross back in the day. Amsoil product have always been reliable , not like some of the others. No mechanical problems in any of my seven bikes.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Have had no problems.
    By  MARK,  a  Verified Buyer  from  Wyoming  on  November 01, 2021

    Describe the issue

    We have not had any trouble with this oil. We run it in our 4 stroke dirt bikes, two of them have the Rekluse Auto Clutch and Two with a stock clutch. Also run it in the Transmission on two of our 2 strokes, both with Auto Clutch. We have run other oils that will start "grabbing", particularly with the Auto Clutches. Have not had that trouble with this oil. We change it out every 6 to 8 hours depending. Have been very happy.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    great
    By  RODNEY,  a  Verified Buyer  from  15642  on  October 31, 2021

    Describe the issue

    my kid loves this oil for his honda 250 motorcross bike.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Best oil on the market
    By  DYLAN,  a  Verified Buyer  on  October 28, 2021

    Describe the issue

    I’ve trusted Amsoil for 6 years now and would never go anywhere else for my oil and lubricant needs. Never have had a bad experience and my engine always holds up strong.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Good oil, fast shipping
    By  JORDAN,  a  Verified Buyer  from  Atlanta  on  October 28, 2021

    Describe the issue

    Use this dirt bike oil for my Kawasaki KFX 400 quad.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    🏁✊🏁
    By  JAMIE,  a  Verified Buyer  from  Hillkuntry, Texas  on  October 27, 2021

    Describe the issue

    Amsoil, when you want the best. A difference you can actually feel. Run nothing but Amsoil in my Harley's and my dirt bikes.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Works well
    By  Max,  a  Verified Buyer  from  Regina, Sk  on  October 25, 2021

    Describe the issue

    My son uses this in both his YZ250F and YZ450F at my insistence (I use Amsoil in all machines I service myself). He rides pretty hard and changes oil every 8-10 hours. Amsoil Dirt Bike seems to work well.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    10W-40
    By  JEFF,  a  Verified Buyer  on  October 19, 2021

    Describe the issue

    I run this in all my motorcycles, ATV and lawnmowers. It's worth it not having to go to in a Wal-Mart and get it delivered to my door.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Best of the Best
    By  TIM,  a  Verified Buyer  on  September 24, 2021

    Describe the issue

    Great product. I run Amsoil products in all my atvs. Orders come quickly every time. I highly recommend Amsoil products
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?