There’s nothing quite like jumping on a big V-twin, feeling the fresh air and freedom to go anywhere you choose, hearing that rumble - and transmission noise. AMSOIL V-twin products are engineered with synthetic technology to protect your bike, prevent overheating and quiet noisy transmissions. Get the best for your bike or learn more below.

Protects Powerful, Hot-Running V-Twins


Harley-Davidson* air-cooled V-twins can get extremely hot, especially when idling or traveling at low speeds. Motorcycle oils that can’t handle the heat may fail to deliver solid wear protection. AMSOIL Synthetic V-Twin Motorcycle Oil is formulated to withstand extreme-heat conditions beyond the hottest temperatures motorcycles typically experience, providing peace of mind that your motorcycle is protected no matter how extreme the operating conditions.

MCV Bottle

20W-50 Synthetic V-Twin Motorcycle Oil

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  • Resists extreme heat, even in slow-moving parade or rally traffic on hot summer days
  • Retains viscosity to deliver excellent wear protection
  • Delivers the convenience of one lubricant for all three sumps
"I changed the engine oil on my Harley and the engine runs 20 to 40 degrees cooler than with the stock Harley."

~ Bud. Alabama.

Synthetic V-Twin Transmission Fluid

Synthetic V-Twin Transmission Fluid

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  • Protects against gear and bearing wear
  • Delivers smooth shifts
  • Helps eliminate loud thunks and gear noise
"Tames the Harley knock when shifting into gear :)"

~ Frank. Newfoundland.

SyntheticV-Twin Primary Fluid

Synthetic V-Twin Primary Fluid

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  • Delivers consistent clutch feel
  • Helps prevent clutch slip
  • Helps riders easily find neutral
"As an engine builder and racer if you own a Harley-Davidson you need AMSOIL in all of your bikes, cooler running smooth shifts and better clutch feel."

~ The tiger. Phoenix, Ariz.

Three Easy Ways to Protect Your Bike

Changing oil, transmission fluid and primary fluid is one of the easiest ways to maximize your bike’s life and performance.
AMSOIL Trade Show Manager and longtime Harley rider Patricia Stoll shows you how.

Watch how to change motor oil on a Harley-Davidson motorcycle.

Find out how to change the transmission fluid on a Harley-Davidson motorcycle.

See how to change the primary chaincase fluid on a Harley-Davidson motorcycle.

Bike Pros Love AMSOIL

"Everything that goes out that back door has got my name on it. And I want the best product for the best dollar coming out of this shop so people will come back."

~ Bill Beard. Owner, Two Wheels Oil & Tires Express

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Don’t use just any oil; make it Official

AMSOIL synthetic motorcycle oil is the Official Oil of many of the largest and most influential motorcycle organizations and events in the world. Its quality is recognized universally by hardcore riders, casual enthusiasts and professionals worldwide.

Official Oil