20W-40 Synthetic V-Twin Motorcycle Oil 

Sioux Falls’s best oil designed specifically for Victory and Indian motorcycles.  Count on AMSOIL for the best performance out of your Victory or Indian. Out performs the OEM product in quality and performance as that is precisely what it was designed to do.

High-Performance Lubricant for Engines and Transmissions. API SM, JASO MA, API GL-1

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil provides Indian and Victory riders with the confidence and security that comes with receiving maximum protection and performance for their bikes. It presents a premium alternative to higher-priced manufacturer-branded semi-synthetic oils.

Reduces Friction, Heat and Wear

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is engineered to protect critical components in high-heat conditions. It exceeds the standard for high-temperature film strength to deliver excellent wear protection (see graph) and contains a heavy treatment of anti-wear additives to reduce wear regardless of operating conditions. AMSOIL 20W-40 is thermally (heat) stable and contains maximum levels of oxidation-inhibitor additives. It is extremely resistant to breakdown and is engineered to prevent damaging sludge and carbon deposits for superior engine cleanliness.

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Provides Anti-Wear Protection for Gears and Chains

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is shear stable and resists thinning from mechanical activity. It performs like a gear lube without the negative effects of extreme-pressure additives, such as poor wet-clutch performance.

Delivers Superior Rust Protection

Motorcycles are prone to rust from storage, humidity and short drives. Rust can cause major damage, such as uncontrolled wear, compression loss and blow-by. Good rust protection, however, comes by design and is not natural to motor oils. Unlike many motorcycle oils, AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil contains special anti-rust agents, providing outstanding protection against rust and corrosion.

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Catalytic-Converter Compatible

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil meets the requirements for emission-system protection and is designed for use in motorcycles with catalytic converters.

Provides Excellent Wet-Clutch Performance

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil delivers the confidence of quiet, smooth shifting and positive clutch engagement. It controls heat and helps prevent slippage and glazing, while its high TBN helps improve clutch life by resisting the acids that can degrade clutch material.


AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is recommended for air- or liquid-cooled Indian, Victory and other four-stroke motorcycles calling for a 20W-40 motor oil. It meets API SM, JASO MA and API GL-1 specifications, providing outstanding protection for engines and transmissions.


AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is compatible with other conventional and synthetic motor oils; however, mixing oils may shorten the oil’s life expectancy and reduce its 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 V-Twin Motorcycle Oil.


For on-road use in engines and transmissions, AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil and AMSOIL Ea® Motorcycle Oil Filters are capable of providing premium protection for up to 2X the motorcycle manufacturer-recommended change interval or one year, whichever comes first. Change other brand oil filters at standard intervals.

For off-road use in engines and transmissions, change AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil at the standard motorcycle manufacturer-recommended 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.

Buy in the Sioux Falls AMSOIL store at 4610 W. 12th St.  or use this Online link to the Amsoil sale page if you are outside of the area.


AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is Warranty Secure, keeping your factory warranty intact. AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil is a high-performance replacement for vehicle manufacturer-branded products and is also backed by the AMSOIL Limited Warranty. For details, visit AMSOIL Warranty Information.


Customer Comments:

Will Use Nothing Else
By Doug 12/24/2016

from undisclosed

I use the 20W-40 in my Indian Motorcycle. Always preferred Amsoil with all of my bikes, previous and current. Good pricing, good product.