Concentrated oil additive designed to reduce oil smoke in engines that burn oil. The high viscosity additive reduces play in worn piston rings, bearings, etc., thereby increasing compression and reducing engine noise. The additive provides extra protection for worn engines and extends the life of the catalytic converter. Usage: Add to warm engine oil at every oil change or between change intervals if oil consumption is really high. 300ml is enough to treat 4 to 6L of oil. NB! Do not add more than 10% of the oil volume.