Wynns Engine Flush is a highly effective detergent concentrate designed to clean all oil lubricating systems prior to an oil change. It quickly and efficiently dissolves varnish, sludge, and other contaminants from vital engine parts, preventing the contamination of fresh oil by residues. This formulation neutralizes acids and frees sticking internal engine components by dissolving deposits, while also providing extra protection during treatment. It can quieten noisy hydraulic valve lifters by removing deposits and is compatible with all mineral, synthetic, single, and multigrade oils. Suitable for regular and low SAPS applications, this engine flush is designed for use in both petrol and diesel engines.