AMSOIL 100% Synthetic Metric Motorcycle Oil 15W-50
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Maximum Film Strength for Air-Cooled & Performance Engines
AMSOIL 15W-50 Synthetic Metric Motorcycle Oil provides the thickest protective film in the metric lineup with an HTHS viscosity of 5.7 cP. Built for air-cooled and high-performance engines in Ducati, KTM, BMW, Royal Enfield, and Triumph motorcycles that generate extreme operating temperatures.
Key Benefits
- Thickest protective film in the metric lineup (HTHS 5.7 cP)
- Built for air-cooled and high-temperature engines
- Lowest NOACK volatility (3.8%) — minimal oil consumption
- Smooth, confident shifts with wet clutch compatibility
- Superior rust and corrosion protection (11.6 TBN)
- JASO MA2 certified
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 20.2 |
| Kinematic Viscosity @ 40°C, cSt | 140.7 |
| Viscosity Index | 165 |
| HTHS Viscosity, cP | 5.7 |
| Flash Point | 238°C (460°F) |
| Pour Point | -39°C (-38°F) |
| NOACK Volatility, % weight loss | 3.8% |
| Total Base Number (TBN) | 11.6 |
Industry Certifications & OEM Approvals
API
- SN
JASO
- MA2
Get AMSOIL 100% Synthetic Metric Motorcycle Oil 15W-50 Today
Order directly through National Synthetics for Preferred Customer pricing and fast shipping.
SHOW MY PRICEIndependent AMSOIL Dealer #1858536
Frequently Asked Questions
What motorcycles use 15W-50 oil?
15W-50 is commonly used in BMW, Ducati, KTM, Royal Enfield, Triumph, and Yamaha motorcycles — particularly air-cooled models that run at higher operating temperatures. Check your owner's manual to confirm.
Why is 15W-50 better for air-cooled engines?
Air-cooled engines run hotter than liquid-cooled engines. The heavier 50-weight rating and 5.7 cP HTHS viscosity maintain a stronger protective film at elevated temperatures, preventing metal-to-metal contact under extreme heat.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.