Cleans the engine from the inside. Removes deposits from lubrication holes, oil screens, piston ring zone, etc. Reduces engine noise and oil consumption. Improves compression. Cleaning and flushing out the oil systems of petrol and diesel engines. One 500 ml can is sufficient for up to 5 litres of oil. Add Pro-Line Engine Flush to the engine oil at running temperature before changing the oil. After adding the product, allow the engine to idle for approx.