UMA RACING PERFORMANCE OIL
UMA Engine Oil Collection
High-performance synthetic engine oils engineered for smoother riding,
maximum engine protection, improved throttle response, and longer engine life.
Liqui Moly Motorbike 4T Optimal 10W-40 is a premium, heavy-duty mineral engine oil developed for air-cooled and water-cooled 4-stroke motorcycle engines. While many performance oils lean toward synthetic blends, the Optimal line utilizes highly refined, selected mineral base oils to provide superior lubrication and noise damping for engines operating under normal to tough conditions.
It is particularly well-suited for older engines or riders who prefer the traditional protection profiles of mineral oils without sacrificing modern performance standards like JASO MA2.
Key Features
- Premium Mineral Base: Formulated using high-quality mineral oils that provide a stable lubricating film and excellent thermal resistance for daily commuting.
- Optimum Noise Damping: Mineral oils are naturally “thicker” at a molecular level compared to synthetics, which helps in significantly reducing mechanical engine noise and “tappet” sounds.
- Gentle Clutch Operation: Fully compatible with wet clutch systems. It ensures smooth engagement and disengagement, preventing clutch slippage and providing a “positive” feel during gear shifts.
- Outstanding Cleanliness: Despite being a mineral oil, it contains a robust additive package that prevents the formation of sludge and deposits, keeping the internal components clean.
- High Wear Protection: Designed to minimize internal friction and wear, extending the service life of critical parts like the piston rings, cylinder walls, and bearings.
- Catalytic Converter Tested: Safe for use in modern motorcycles equipped with catalytic converters, ensuring no negative impact on exhaust emissions systems.
Technical Specifications
| Feature | Liqui Moly 4T Optimal Details |
| Viscosity Grade | 10W-40 |
| Oil Type | Mineral |
| Volume | 1 Liter |
| JASO Standard | JASO MA2 (Optimal friction for wet clutches) |
| API Standard | API SP / SN Plus (Highest modern protection levels) |
| Density at 15°C | 0.860 g/cm³ |
| Flash Point | 230°C |
Why Choose Liqui Moly 4T Optimal 10W-40?
- Versatility: It is an “all-rounder” oil. Whether you have a vintage cruiser or a modern 150cc–250cc commuter, this oil provides the balanced protection needed for mixed city and highway use.
- Smooth Shifting: If you experience “notchy” or hard gear shifts with synthetic oils, switching to this mineral-based Optimal oil often results in a much smoother gearbox feel.
- Modern Protection for Older Tech: It carries the latest API SP rating, meaning it provides the highest level of protection against timing chain wear and LSPI (Low-Speed Pre-Ignition), even in a mineral format.
Usage Tip
To maintain peak performance, it is recommended to use this product “unmixed” (do not top up with other brands or grades). For motorcycles used in heavy stop-and-go traffic, a drain interval of 2,500 to 3,500 km is generally ideal to ensure the mineral base remains at its most protective state.
