15W-50 100% Synthetic Metric Motorcycle Oil
AMSOIL 15W-50 Metric is a premium synthetic engine oil specifically engineered for high-performance 4-stroke motorcycles. It is designed for motorcycles with wet-clutch systems, high-RPM engines, and those requiring maximum protection in extreme conditions. It delivers outstanding performance in both everyday riding and more aggressive conditions.
✅ Key Benefits
🔧 Superior Wear Protection
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Designed to reduce friction, heat, and wear, even under high temperatures.
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Maintains a durable protective film and includes advanced additives to minimize engine wear and sludge/carbon buildup.
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Keeps the engine clean for better efficiency and longevity.
⚙️ Gearbox Protection Without Separate Gear Oil
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No need for separate transmission oil.
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Provides exceptional gear protection under extreme pressure conditions.
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Achieved a perfect score in the FZG gear wear test — wear rating of zero.
🌧️ Outstanding Rust Protection
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Motorcycles are often exposed to moisture, which can cause rust.
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Contains anti-rust additives proven effective through ASTM D-1748 testing.
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Prevents engine damage and compression loss caused by internal rust.
🏍️ Optimized for Wet-Clutch Performance
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Free from friction modifiers that cause clutch slippage.
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Ensures smooth gear shifts, consistent clutch engagement, and optimal heat management.
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Meets the JASO T903:2006 MA/MA2 and ISO-L-LEMA2 (ISO 24254:2007) wet-clutch standards.
🛠️ Recommended Applications
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Suitable for air- or liquid-cooled 4-stroke motorcycle engines requiring SAE 15W-50.
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Intended for motorcycles that do not require API GL-4 or GL-5 gear oils.
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Recommended for brands such as:
Ducati®, BMW®, KTM®, Yamaha®, Triumph®, Royal Enfield®, and others using 15W-50 engine oil.
🔄 Compatibility with Other Oils
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Compatible with other synthetic and conventional motorcycle oils.
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Mixing will reduce the extended service benefits and performance of AMSOIL.
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No oil additives (treatments) are recommended for use with this oil.
🕒 Service Life
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On-road use:
Up to 1 year or twice the OEM recommended interval (typically 10,000–12,000 km or 1 year, whichever comes first). -
Off-road use:
Follow OEM service interval recommendations.
| TYPICAL TECHNICAL PROPERTIES | |
| AMSOIL 15W-50 Synthetic Metric Motorcycle Oil (MFF) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D445) | 20.2 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D445) | 140.7 |
| Viscosity Index (ASTM D2270) | 165 |
| Pour Point °C (°F) (ASTM D97) | -39 (-38) |
| Flash Point °C (°F) (ASTM D92) | 238 (460) |
| Fire Point °C (°F) (ASTM D92) | 274 (525) |
| NOACK Volatility, % weight loss (g/100g) (ASTM D5800) | 3.8 |
| High Temperature/High Shear Viscosity @ 150°C, 1.0 X 106 s-1, cP (ASTM D4683) | 5.7 |
| Total Base Number (ASTM D2896) | 11.6 |
| Four-Ball Wear Test (ASTM D4172: 40 kg, 150°C, 1800 rpm, 1hr), Scar, mm | 0.34 |
| Foam (ASTM D892, Sequence l, ll & lll) | 0/40/0 |
| Rust Test-Humidity Cabinet (ASTM D1748) | No Rust, Pass |
