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SAE 20W50 High Performance Synthetic Motorcycle Oil

The Best Synthetic Motor Oil for Your Harley-Davidson

"The Toughest Motorcycle Oil You Can Buy for Your Harley"

This motorcycle oil is so tough that it meets the SAE 90 and API GL-1 gear oil requirements for Harley-Davidson transmissions and primary chain cases!

100% American Made

100% American Made
Black Harley Davidson Fatboy

Outperforms all other conventional and synthetic motorcycle oils. Exclusive new AMSOIL Synthetic Motorcycle Oils provide second-to-none performance and protection for hot-running American motorcycle engines, transmissions, and primary chain cases.

The Highest Performance Synthetic Motorcycle Oil Increases Power and Engine Life for Harley Davidson Motorcycles
See prices or place an Order in the AMSOIL Online Store.
  • Reduces operating temperatures
  • Increases performance
  • Maximum protection against wear
  • Extends engine and transmission life
  • Doubles oil change intervals

PRODUCT DESCRIPTIONRun cooler with AMSOIL Synthetic Motorcycle Oil
AMSOIL Synthetic 20W-50 Motorcycle Oil (MCV) is a premium oil designed for those who demand the absolute best lubrication for their motorcycles. AMSOIL MCV is the result of extensive research, and it is specially formulated to excel in all areas unique to motorcycles, including the high temperatures of air-cooled Harley Davidson V-Twin engines, transmissions, and primary chain cases.

  AMSOIL Vs HD Screamin Eagle Synthetic Oil

Reduces Friction, Heat, and Wear
In high heat conditions, engine protection is not sacrificed with AMSOIL Synthetic Motorcycle Oil. It has the best high temperature film strength (see High Temperature Viscosity Protection graph below) of all oils tested and contains a heavy treatment of antiwear additives to reduce friction and wear regardless of the operating conditions.

Friction consumes power and creates heat. When it is reduced, more horsepower is produced and the engine runs cooler.

If you want maximum performance and the confidence that you have the toughest motorcycle oil in your expensive Harley, then AMSOIL Motorcycle Oil is for you. Order some today.

AMSOIL MCV is thermally (heat) stable and lasts much longer that other motorcycle oils. For most on road use you can safely double you factory oil change intervals. It is extremely resistant to breakdown and engineered to prevent damaging sludge and carbon deposits for superior engine cleanliness.

AMSOIL, the leader in synthetic lubrication, produced the world's first API qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your motorcycle.

20W-50 Motorcycle Oil
High Temperature Viscosity Protection

Higher values reflect better film strength
ASTM Test Method D-4683 March 16, 2005

20W-50 Motorcycle Oil
Wear Comparison

ASTM Test Method D-4172 March 16, 2005

20W-50 Motorcycle Oil High Temperature Viscosity Protection

20W-50 Motorcycle Oil Wear Comparison


For "on road" use in engines, transmissions and primary chaincases, change AMSOIL MCV and AMSOIL engine oil filter at twice the motorcycle manufacturer change interval or one year, whichever comes first. Change other brand oil filters at standard intervals.

For "off road" use in engines, transmissions and primary chaincases, change AMSOIL MCV at the standard motorcycle manufacturer change interval.

For racing or in engines modified from the original factory design, no change interval recommendation is made. Oil changes are at the owner's discretion.

Provides Extreme Pressure Protection for Gears

With AMSOIL MCV, there is no need for separate transmission or primary chaincase lubricants. It is absolutely shear stable and will not thin out from mechanical activity. AMSOIL MCV performs like a gear lube without the negative effects of extreme pressure additives. In the FZG gear test, AMSOIL MCV achieved a perfect score with a "zero" wear rating (see photos below).

FZG Gear Test (ASTM D-5182)

FZG Gear Test (ASTM D-5182)
Motul 300V 15W-50

Motorcycle Gear wear pattern

Motorcycle Gear wear pattern


The Best Motorcycle Oil Filter

AMSOIL Motorcycle Oil Filter - The best filter you can buy for your bike.A full-flow filter specifically designed for extended drain intervals and severe service for motorcycle applications.

Provides superior filtering efficiency, engine protection, and greater capacity than other popular filters.

These filters have the extra capacity to last as long as AMSOIL Synthetic Motorcycle Oil. Change other brand oil filters at standard intervals.

Delivers Superior Rust Protection

Motorcycles are prone to rust from storage, humidity and short drives. Rust can cause major damage such as roller bearing failure, uncontrolled wear, compression loss and blow-by. Good rust protection, however, comes by design and is not natural to engine oils. Unlike many motorcycle oils, AMSOIL MCV contains special antirust agents. It passes the ASTM D-1748 humidity cabinet rust test and clearly demonstrates superior rust protection.

Provides Excellent Wet Clutch Performance

AMSOIL MCV contains no friction modifiers and promotes smooth shifting and positive clutch engagement. AMSOIL MCV controls heat and prevents slippage and glazing, and its high TBN resists acids that can degrade clutch material, helping improve clutch life.


AMSOIL Synthetic 20W-50 Motorcycle Oil is recommended for air or liquid cooled engines.

Meets SAE 90, API GL-1 gear oil requirements and is recommended for transmissions and primary chaincases.

AMSOIL MCV is recommended for Harley Davidson motorcycles whenever 15W50 or 20W50 engine oils or SAE 90, GL1 gear oils are used.

Not recommended for shaft drive hypoid gears or where an API GL4 or GL5 gear oil is required.

AMSOIL Synthetic Motor Oil, Racing Oil and Diesel Oil Improve Gas Mileage and Increase Horsepower


Injen Cold Air Intake Systems Increase Horsepower, improve gas mileage and diesel fuel economy


WIX Filters are The Number One Filter in NASCAR


NGK Iridium Spark Plugs Increase Horsepower and Fuel Economy


Donaldson Heavy Duty Oil and Air Filters Increase Performance and Reduce Maintenance Costs

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MPG Performance is dedicated to providing you with the best high performance products that improve gas mileage, increase horsepower, diesel fuel mileage, and reduce maintenance costs for all auto, truck, diesel, SUV, motorcycle, boat, and ATV applications. We have the best synthetic motor oil, heavy duty diesel oil, marine motor oil, synthetic motorcycle oil, 2 stroke and 4 stroke racing oil, transmission fluid, synthetic gear oils, NGK spark plugs & wires, and the most complete line of advanced performance air filters and oil filters, including high performance Injen AMSOIL gasoline and diesel air intake systems. We also show you the best places to get discount high performance auto parts to help you save money.

Our Maximum Fuel Economy section shows you how to get better gas mileage, improve diesel fuel economy, and increase horsepower. We have combined race proven performance products and sound fuel efficiency methods into a complete step-by-step program that includes free gas mileage tips. This fuel saving program also helps the environment. It will reduce your vehicle's exhaust emissions and pollution which can help reduce global warming.

Consult the AMSOIL Online Product Application Guide and your owners manual for service recommendations.
 Your results will vary depending on the mechanical and operating conditions of your vehicle.

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