Viscosity controlled in relation to temperature: its additives thicken the oil at high temperatures and give it fluidity at low temperatures.Piston ring sealing, power gains: it reduces piston ring groove fouling for optimum sealing during combustion. Full power of your engine is maintained.Oxidation resistance: Elf Moto4 Road 15W-50 has anti-oxidant additives which neutralise and slow down the oxidation process.Anti-clutch slippage, disk protection: Because of their molecular structure, the base oils are able to form a homogenous film between the clutch disks.