AMSOIL 100% Synthetic Metric Motorcycle Oil 10W-40
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The Most Popular Metric Motorcycle Viscosity
AMSOIL 10W-40 Synthetic Metric Motorcycle Oil is the most widely used viscosity for metric motorcycles. With an HTHS viscosity of 4.7 cP, it provides robust film strength for engines and transmissions in BMW, Honda, Kawasaki, Suzuki, Triumph, and Yamaha motorcycles.
Key Benefits
- Most popular viscosity for metric motorcycles
- Strong film protection (HTHS 4.7 cP)
- Smooth, confident shifts with wet clutch compatibility
- No friction modifiers — prevents clutch slippage
- Superior rust and corrosion protection (11.6 TBN)
- JASO MA/MA2 certified
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 14.6 |
| Kinematic Viscosity @ 40°C, cSt | 92.1 |
| Viscosity Index | 165 |
| HTHS Viscosity, cP | 4.7 |
| Flash Point | 230°C (446°F) |
| Pour Point | -43°C (-45°F) |
| NOACK Volatility, % weight loss | 7.2% |
| Total Base Number (TBN) | 11.6 |
Industry Certifications & OEM Approvals
API
- SN
JASO
- MA/MA2
GL
- GL-1
Pros and Cons
Pros
- Most popular viscosity for metric motorcycles
- Strong film protection (HTHS 4.7 cP)
- Smooth, confident shifts with wet clutch compatibility
- No friction modifiers — prevents clutch slippage
- Superior rust and corrosion protection (11.6 TBN)
- JASO MA/MA2 certified
Cons
- Premium Investment: Higher initial cost compared to conventional or "shelf-brand" synthetic oils.
- Limited Local Retail: Primarily available through authorized dealers and specialized synthetic outlets. National Synthetics is a local stocking dealer. Call 1-678-944-8816 to confirm in-stock items for same-day local pickup.
Get AMSOIL 100% Synthetic Metric Motorcycle Oil 10W-40 Today
Order directly through National Synthetics for Preferred Customer pricing and fast shipping.
SHOW MY PRICEIndependent AMSOIL Dealer #1858536
Shipping & Returns
Fast, Reliable Shipping
- Free standard ground shipping on orders of $100 ($130 in Canada) or more.
- Orders under the threshold ship for a flat $9.99 ($12.99 in Canada) freight charge.
- In-stock items typically delivered in two to three business days.
- U.S. and Canada only — no shipments to PO Boxes.
30-Day Return Policy
- Return unopened, currently marketed products within 30 days for a full refund (minus freight).
- Exchange unopened products within 90 days with no restocking fee.
- Special-order items are non-returnable.
- Returns are handled directly by AMSOIL.
Frequently Asked Questions
10W-40 is the most popular viscosity for metric motorcycles including BMW, Can-Am, Honda, Kawasaki, Suzuki, Triumph, and Yamaha models. Check your owner's manual to confirm.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.