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Motorcycle Oil

Motor oil plays a vital role in both areas. The formulation influences the dynamic friction you experience, which is best thought of as clutch feel. Oils with incorrect frictional properties can result in inconsistent or “loose” clutch feel. This negatively affects your ability to confidently pull away from a red light without the bike cutting out, or start quickly and grab the holeshot in a race. The oil also contributes to the holding power, or static friction, between the plates once the clutch lever has been let all the way out and you’re riding. Oils with incorrect frictional properties can allow the plates to slip in some circumstances, which you’ll feel as lost power to the ground. A powerful V-twin riding up a hill, for example, can generate sufficient load to cause the clutch plates to slip and the bike to surge.

The oil’s additive chemistry has the greatest effect on performance. Friction modifiers, added to some passenger car/light truck motor oils to maximize fuel economy, can decrease the coefficient of friction within the clutch pack and result in excessive slippage. Extreme-pressure additives, commonly used in gear lubes to protect against shock loads and intense pressures, can cause excessive clutch slippage and related damage.

The key is to use a lubricant specifically formulated for wet clutches. AMSOIL Synthetic V-Twin Motorcycle Oil, Synthetic Metric Motorcycle Oil, Synthetic Dirt Bike Oil and Synthetic Dirt Bike Transmission Fluid contain no friction modifiers or extreme-pressure additives. They’re dialed-in with the correct frictional properties to promote smooth shifts and consistent clutch feel while guarding against wear for long clutch life.

Veteran Mechanic Solves Valvetrain Noise

Harley Sportster Runs Quiet, Cool With AMSOIL Motorcycle Oil

AMSOIL customer James Shaffer of Winston Salem, North Carolina first tried AMSOIL Motorcycle Oil to solve a problem in his 2014 Harley-Davidson® Sportster XL1200T.“Being a 40-year veteran L1 Certified automotive technician, I was not a big fan of the valvetrain noise,” Shaffer said. “The engineer in me was determined to do something to fix this problem that I thought should not exist in 2014.”In his research, Shaffer found many other Harley owners were using AMSOIL products. At 256 miles, Shaffer installed AMSOIL 20W-50 Synthetic Motorcycle Oil and an AMSOIL Ea Oil Filter.“I took it for a test drive and … over half the noise was gone, and I also noticed it does not foam up on the dipstick under severe heat like the oil that came in it,” Shaffer said. “This is so amazing to me that words cannot explain.”

Our Products
Click on the product to view specifications and order online

10W-40 Synthetic Dirt Bike Oil

Shock Therapy® Suspension Fluid #5 Light

10W-30 Synthetic Metric Motorcycle Oil

Synthetic V-Twin Transmission Fluid

20W-50 Synthetic V-Twin Motorcycle Oil

Gasoline Stabilizer

Motorcycle Octane Boost

AMSOIL Motorcycle Oil Filters


Ed Welliver
2421 S. Conway Ave
Mission,TX 78572
A full service dealer!
AMSOIL Warranty

AMSOIL guarantees the performance of its products, so you can be confident they perform as advertised. AMSOIL introduced the world’s first API-qualified synthetic motor oil and has since introduced a full line of industry firsts. For more than 40 years, AMSOIL synthetic lubricants have proven themselves in the lab, on the racetrack and on the highway.