AMSOIL 10W-30 100% SYNTHETIC METRIC MOTORCYCLE OIL

AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil delivers premium wear protection, clean engine performance, and smooth wet-clutch shifting for four-stroke metric motorcycles. It is purpose-built for the shared-sump designs found in Honda, Kawasaki, Suzuki, and Yamaha sport bikes, cruisers, touring machines, and adventure bikes.

Metric motorcycles place unique demands on their oil. The engine, transmission, and wet clutch all share the same lubricant, which means the oil has to protect high-rpm engine components, survive the shearing forces of meshing gears, and still allow the clutch plates to grab without slipping. A single formulation has to do three very different jobs at once, and conventional or automotive oils are not designed for that kind of multi-tasking.

PREMIUM WEAR PROTECTION AT HIGH TEMPERATURES
AMSOIL 10W-30 Synthetic Metric Motorcycle Oil exceeds industry standards for high-temperature film strength, maintaining a protective barrier between metal surfaces even under extreme thermal loads. It delivers a high-temperature/high-shear viscosity of 3.5 cP at 150°C (ASTM D4683), well above the minimum threshold for the 10W-30 grade. In Four-Ball Wear Testing (ASTM D4172), it produced a wear scar of just 0.37 mm, demonstrating a strong anti-wear additive package that protects cylinder walls, bearings, cams, and transmission gears regardless of riding conditions. Whether you're sitting in stop-and-go traffic on a Honda CB650R or wringing out a Kawasaki Ninja 650 on a canyon road, the oil holds up.

RESISTS BREAKDOWN AND KEEPS ENGINES CLEAN
High operating temperatures accelerate oxidation, which leads to sludge and carbon deposits that rob power and shorten engine life. AMSOIL 10W-30 Metric Motorcycle Oil uses optimized antioxidant additives and a 100% synthetic base to resist thermal degradation. Its Noack Volatility is just 5.8% weight loss (ASTM D5800), meaning it stays in the engine rather than burning off through the exhaust. A flash point of 244°C (471°F) and fire point of 260°C (500°F) further confirm its thermal stability. The result is a cleaner engine with less deposit buildup over the life of the oil. With a total base number (TBN) of 11.6 (ASTM D2896), it also provides strong acid-neutralizing capacity to resist corrosion and maintain internal cleanliness across extended service intervals.

SMOOTH, CONFIDENT WET-CLUTCH SHIFTING
This is where motorcycle-specific formulation really matters. Automotive oils typically contain friction modifiers that reduce engine friction but cause wet-clutch slippage. AMSOIL 10W-30 Metric Motorcycle Oil contains no friction modifiers and meets JASO MA/MA2 standards, delivering positive clutch engagement and smooth shifts in bikes like the Yamaha MT-07, Suzuki SV650, and Honda Africa Twin. The formulation controls heat at the clutch pack to prevent glazing, which extends clutch plate life and keeps shift feel consistent mile after mile.

CONTROLS FOAM UNDER HIGH-RPM OPERATION
At sustained high rpm, oil can aerate as it gets churned by the crankshaft and transmission gears. Foam bubbles collapse under load and allow metal-to-metal contact. AMSOIL 10W-30 Metric Motorcycle Oil delivers foam test results of 0/20/0 ml in ASTM D892 Sequences I, II, and III, meaning virtually zero sustained foam. Riders pushing their bikes hard through track days or aggressive sport-touring can count on consistent film protection.

SUPERIOR RUST AND CORROSION PROTECTION DURING STORAGE
Motorcycles often sit for weeks or months during the off-season. Unlike many motorcycle oils, AMSOIL 10W-30 Metric Motorcycle Oil contains dedicated anti-corrosion agents and passes the ASTM D1748 Humidity Cabinet Rust Test with no rust. The high 11.6 TBN provides additional protection against acid-driven corrosion during long periods of inactivity.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL 10W-30 Synthetic Metric Motorcycle Oil meets API SH and GL-1 specifications, as well as JASO MA/MA2 for wet-clutch compatibility. It is designed for use in Honda, Kawasaki, Suzuki, Yamaha, and other metric motorcycles that call for a 10W-30 motorcycle oil. It is not recommended for applications requiring API GL-4 or GL-5 gear oil. AMSOIL backs this product with its Limited Warranty and Warranty Secure guarantee, so it will not void your motorcycle's factory warranty.

SERVICE LIFE
When paired with an AMSOIL Oil Filter, this oil supports up to twice the motorcycle manufacturer's recommended oil change interval in miles or hours, or one year, whichever comes first. When using any other oil filter, change the oil and filter at the manufacturer's recommended intervals. Extended drain intervals are not recommended for racing or modified engines; those intervals are at the owner's discretion.