Description

AMSOIL 20W-50 100% Synthetic V-Twin Motorcycle Oil

AMSOIL 20W-50 100% Synthetic V-Twin Motorcycle Oil is engineered for riders who demand reliable engine protection under tough conditions.

Harley-Davidson/AMSOIL Oil Chart

Since introducing the first API-qualified synthetic motor oil in 1972, AMSOIL has provided technology that supports motorcycle performance and durability.

Limits Wear and Deposits

This formula is enriched with a strong dose of anti-wear additives that hold up across a wide range of operating temperatures. It remains thermally stable and resists oxidation thanks to its advanced additive package. In a 1,000-mile dyno test, where oil temperatures hit 300ºF and cylinders reached 421ºF, AMSOIL V-Twin Oil effectively prevented piston-ring sticking and piston scuffing, maintaining compression and power.

Secures Transmission and Primary Chaincase

Designed to handle both engine and gearbox demands, this oil resists viscosity loss caused by mechanical shear. It behaves like a gear lube without relying on typical extreme pressure additives, protecting transmission gears and compensators notably better than Harley-Davidson SYN3 by a factor of six.

Handles Elevated Temperatures

V-twin engines generate significant heat, particularly in stop-and-go traffic during warm seasons. AMSOIL’s synthetic base oils are naturally resistant to oxidation and break down far less under heat, helping maintain engine cleanliness and efficiency even in intense riding conditions.

Enhanced Rust Protection

Rust causes critical engine wear during periods of storage or short rides. Unlike many standard oils, this product includes targeted anti-rust agents and has cleared ASTM D1748 humidity cabinet testing, ensuring better protection against rust-related damage.

Optimized Wet-Clutch Performance

By excluding friction modifiers, AMSOIL 20W-50 100% Synthetic V-Twin Motorcycle Oil promotes smooth shifting and positive clutch engagement. Its high TBN value counters acid build-up that can degrade clutch materials, improving durability and performance.

This oil suits motorcycles requiring 20W-50 grades and meets specifications like JASO MA/MA-2 and API SG/SL/CF/CG-4. It’s compatible with synthetic and conventional oils but mixing is discouraged as it reduces performance and oil life.

Service Life and Warranty

You can generally double the manufacturer’s recommended change intervals or use it up to one year across the engine, transmission, and primary chaincase. Harley-Davidson Big Twin transmissions should follow their up-to-date synthetic oil drain guidelines. AMSOIL 20W-50 is Warranty Secure, preserving your factory warranty and backed by the AMSOIL Limited Warranty.

Health & Safety

The product presents no significant health risks under recommended use. For handling guidance consult the Safety Data Sheet available online or upon request. Always keep out of reach of children and recycle used oil and containers properly.

• Formulated to resist thinning under high heat
• Robust anti-wear protection for engine components
• Prevents rust damage during storage and short trips
• Maintains viscosity longer than competing synthetic blends
• Supports effective wet-clutch operation without additives that cause slippage