Highly effective detergent additives in Engine Flush cleans interior engine before oil change. Product Features:Removes deposits, residues from all 4-stroke gasoline anddiesel enginesDissolves sludge, lacquer and isolates solid particles and liquid contaminantsImproves the combustion process and restores full engine performanceRecovers oil lubricating propertiesCleans and flushes the motor oil system ofgasoline and diesel engines.Promoteshydraulic function e.g. VVT, VANOS and other oil actuated switches and valves.One 500 ml can is sufficient for up to 5 liters(1.3 gal.) 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. 10 to 15 minutes depending on the