Description
SYNTHESIS MOTORCYCLE 10W-40
When you need a high-quality, fully synthetic motorcycle oil, this 4L product from world-renowned brand Rock Oil delivers a smooth ride with reduced noise and vibration. This lubricant is ideal for those who love to push their motorcycles to the limit whether it’s on a race track or just cruising through the countryside. Sparks stocks this 10W-40 oil for motorcycles as we know the potential it has to maintain a clean engine for maximum performance.
Key Features
- Tri-Synthetic Formula includes Ester, PAO and a proprietary next-generation base oil
- Longer life to allow extended drain intervals in the most arduous applications and environment
- Market-leading additive technology
- Maintains ultra-clean internal engine components throughout the drain interval
- Outstanding shear stability through the use of active, self-healing Viscosity Modifiers
- Important for maintaining stay-in-grade viscosity and stable oil pressure throughout the life of the product
- Exceptionally low NOACK Volatility
- 3 x lower oil consumption in a high-temperature environment*
- Employs market leading Anti-Wear additives
- Up to 60% reduction in valve-train wear*
- Passes JASO T903 wet clutch friction test to the highest level – JASO MA2 / JASO MA
- Assured use in motorcycle engines with combined crankcase, gearbox and oil-immersed (wet) clutch
*Data based on Synthesis Motorcycle 10W-40, compared to API SN test limits and reference oils
Performance Specifications, Approvals & Recommendations
API SN, SM, SL, SJ, SH, SG
JASO MA2 / MA
Rock Oil Synthesis Synthetic Motorcycle Oil FAQs
Rock Oil Synthesis 10W-40 is designed for most modern 4-stroke motorcycles requiring a fully synthetic 10W-40 oil, especially bikes with shared engine, gearbox, and wet clutch systems.
Yes. This oil meets JASO MA2, meaning it’s specifically formulated to work safely with wet clutch motorcycles, helping prevent clutch slip.
Fully synthetic oil typically offers:
- Better high-temperature protection
- Improved cold-start lubrication
- Reduced engine wear
- Better shear stability in gearbox applications
- Longer-lasting performance between oil changes
This matters especially for high-revving motorcycles.
Yes. Rock Oil positions the Synthesis range toward high-performance road and racing-inspired use, making it suitable for sports bikes, naked bikes, and aggressive road riding.
Absolutely. While performance-focused, it’s also suitable for:
- Daily commuting
- Weekend riding
- Touring
- Stop-start urban riding
- Mixed weather conditions
10W-40 refers to oil viscosity:
- 10W = cold-start flow performance
- 40 = protection at operating temperature
It’s one of the most common motorcycle oil grades, but always check your bike manufacturer’s handbook.
Customers usually compare:
- Brand reputation
- Wet clutch performance
- Shift smoothness
- Engine protection
- Value for money
Rock Oil stands out for its UK motorsport heritage and advanced ester-based synthetic formulation.
Yes. Its shear stability and anti-wear additives make it appropriate for:
- Fast road riding
- Summer riding
- Track days
- High-RPM performance use
Though dedicated race oils may be preferred for full-time race applications.
Change intervals depend on:
- Manufacturer recommendations
- Riding style
- Mileage
- Track vs road use
- Environmental conditions
Hard riding typically means more frequent oil changes.
For riders wanting:
- Premium engine protection
- Better clutch compatibility
- Cleaner internals
- Reduced wear
- Stable performance under stress
…it’s positioned as a premium-value fully synthetic option.
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