20w40 Motorcycle Oil - Mineral Based
3008-5
- Dispatched in 2-3 days
- 30 Day Return Policy
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20W40 Mineral 4-Stroke Engine Oil
Premium High-Performance Protection for Marine & Motorcycle Engines
This 20W40 4T Mineral Engine Oil is a high-performance lubricant specifically formulated for 4-stroke engines that demand a heavier viscosity and superior shear stability. Engineered with a robust mineral base and fortified with elevated levels of Zinc (ZDDP), it provides an exceptional protective film to reduce wear and excessive heat in both high-load marine environments and classic motorcycle applications.
Key Benefits
- β ZDDP Fortified: High zinc levels for extreme wear protection.
- β Wet Clutch Safe: Contains no molybdenum additives.
- β Seal Compatible: Excellent for classic and older engines.
- β Shear Stability: Maintains viscosity under high temperatures.
Technical Specs
| Viscosity | SAE 20W-40 |
| Oil Type | Mineral Based |
| API Standard | SJ (Backwards Compatible) |
| JASO Standard | MA / MA2 |
| Clutch Type | Wet or Dry Clutches |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Yamaha Marine | 4-Stroke Outboard Engines | Replaces Yamalube 20W-40 |
| Classic Motorcycles | Vintage Honda, Suzuki, Kawasaki, BMW | Ideal for air-cooled engines |
| Triumph | Classic Twin/Triple Engines | Excellent seal swell properties |
OEM Cross Reference
| Yamaha | LUB-20W40-FC-04 |
| Yamaha | ACC-Y4M20-40-04 |
| Yamalube | 4M 20W-40 Mineral |
Questions & Answers
Is this oil suitable for marine outboards?
Yes. This 20W40 mineral oil is specifically engineered to meet the requirements of older 4-stroke outboards, providing excellent corrosion resistance and anti-foam properties required for marine use.
How do I know if it is compatible with my wet clutch?
This oil is JASO MA2 certified, which is the highest standard for wet clutch compatibility. It contains no friction modifiers (Molybdenum) that can cause clutch slippage.
Why choose 20W40 over 10W40 for classic bikes?
20W40 provides a thicker cold-start viscosity which can be beneficial for older engines with wider tolerances, helping to maintain oil pressure and reduce internal noise/leakage.
Note: Please verify your engine's oil requirements in your owner's manual before purchasing. For technical support, contact 4boats.co.uk.
For the products under Β£150 the shipping is Β£6.99.
Free delivery for most items over Β£150.
