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AMSOIL Synthetic Motorcycle Oils

AMSOIL synthetic motorcycle oils are blended with the finest synthetic basestocks and high-quality additives to provide tough lubricating protection for all four-cycle motorcycle and ATV engines — including water-cooled engines and air-cooled V-twins such as Harley-Davidson. Wet-clutch compatible with superior wear protection.

Superior Wear Protection for Motorcycles

Motorcycle manufacturers want the best protection possible for their equipment, calling for rugged oils that provide high-temperature deposit control additives. AMSOIL Synthetic 10W-40 and 20W-50 motorcycle oils give motorcyclists what they need: superior wear protection for high-strike motorcycle engines and transmissions, and clutches that stay clean and deposit-free.

AMSOIL Synthetic 10W-40 and 20W-50 motorcycle oils

Conventional petroleum oils break down and oxidize when faced with high temperatures, such as those experienced when idling in traffic, contributing to the formulation of deposits, sludge and varnish. AMSOIL withstands oil breakdown and oxidation in high temperatures, which keeps engines running cool and clean.

The AMSOIL Advantage: Runs cooler (reduces crankcase temperature) · Superior 12+ TBN synthetic formulation for long service life and maximum protection against engine wear · No friction modifiers, ensuring dependable starting and smoother running · Wet clutch compatible. Recommended for all V-twin and other four-cycle motorcycle and ATV engines requiring an API SJ, SH, SG, SF, CH-4, CF-2, CF, CD or JASO MA oil.

ASTM D4172 Four-Ball Wear Test showing AMSOIL motorcycle oils' smaller wear scar
Per the ASTM D4172 Four-Ball Wear Test, AMSOIL Motorcycle Oils leave a wear scar up to 36 percent smaller than those left by competing oils.

Switch to AMSOIL Synthetic Motorcycle Oil today!

Motorcycle Oil Products

AMSOIL 20W-50 synthetic motorcycle oil (product code AMV)

Synthetic Motorcycle Oil 20W-50

Superior wear protection for high-strike motorcycle engines and transmissions with clutches that stay clean and deposit-free.

Product Code: AMV

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AMSOIL Synthetic 10W-40 motorcycle oil

Synthetic Motorcycle Oil 10W-40

Superior wear protection for high-strike motorcycle engines and transmissions with clutches that stay clean and deposit-free.

Product Code: AMF

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Synthetic Shock Therapy Suspension Fluid

Formulated for fade-free dampening and smooth rebounds in racing and recreational applications. Also prevents fade more effectively than conventional suspension fluids. Ideal for both front forks and shocks. Available in two viscosity grades.

AMSOIL Synthetic Shock Therapy Suspension Fluid, lightweight grade (STL)

STL — Lightweight Grade

Recommended for applications that demand quick rebounds under extreme temperatures.

Product Code: STL

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AMSOIL Synthetic Shock Therapy Suspension Fluid, medium grade (STM)

STM — Medium Grade

Recommended for applications that require more dampening and slower rebounds.

Product Code: STM

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Synthetic 4-Stroke 0W-40 for ATVs

AMSOIL Synthetic 4-Stroke 0W-40 is specially formulated to provide serious protection and performance in recreational four-stroke motors, including ATV's, snowmobiles, outboard motors and motorcycles. Broad 0W40 viscosity rating provides superior protection in both hot and cold temperature extremes. Also provides superior shear stability and resistance to vaporization.

Recommended for All ATV's and recreational vehicles requiring a 0W-40, 5W-30, 5W-40, 10W-30 and 10W-40 viscosity grade. Safe for use in wet or dry sumps, manual or automatic clutches and with clutch plates in ATV's and motorcycle transmissions.

  • API Service SJ, SH, SG, SF, CD, CF
  • JASO MA

Switch your ATV to AMSOIL Formula 4-Stroke 0W-40 today! Product Code: AFF

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AMSOIL Synthetic 4-Stroke 0W-40 motor oil for ATVs