Liqui moly 5200 oil sludge scourer 300ml liqui moly 5200 p this oil sludge scourer 300ml from liqui moly cleans the engine keeps the oil screen and oil borings free of sludge and blockages while reducing deposits in the piston grooves therefore preventing deficient lubrication and protects the engine against engine damage p p for all petrol and diesel engines with and without turbocharging simple and economical to use while compatible with all commercially available engine oils