STP Oil Treatment for Petrol Engines 60450EN 450ml The exclusive formula in STPA Oil treatment for Petrol Engines fortifies motor oil with an extra measure of additives, providing increased levels of viscosity improver plus anti wear, anti friction and anti oxidation agents. STPA Oil Treatment for Petrol Engines, a mineral oil based additive, provides extra protection against engine heat and allows oil to maintain key lubricating properties for longer to keep the engine going strong until the next oil change. STPA Oil Treatment for Petrol Engines used regularly helps Reduce engine wear Reduce engine deposits, keeping vital engine parts cleaner Reduce oil consumption Provide extra engine protection Improve oil viscosity Fight oil oxidation and breakdown Reduce corrosion STPA Oil Treatment for Petrol Engines. Is recommended for use in all four cycle petrol engines including cars, trucks, vans, tractors, boats, motorcycles, marine engines Is effective with all types of engine oil Can be used in a turbo charged vehicle Must not be used in a vehicle with a wet clutch: the friction reducing properties of STP Oil Treatment for Petrol Engines will make the clutch slip. Must not be used in a two stroke vehicle Is best added to a fresh oil change or in between changes to boost or replenish key additives Can be used with other STPA additives. How STPA Oil Treatment for Petrol Engines Works All motor oils contain additives to fight friction and reduce engine wear, but whatever quality of oil being used, the heat and extreme pressure generated by just normal driving uses up and breaks down this protection. Fresh motor oil and motor oil's additives can begin to break down after just 50 miles, and as a result may not provide the necessary protection between oil changes. This results in a sludge build up, oil oxidation, and acid formation, which all lead to excessive wear and poor engine performance.