MOTUL ENGINE CLEAN is an internal engine cleaner used to flush away deposits, varnishes, and residues produced during normal operation. Safe in gasoline or diesel applications with or without a turbo charger. Helps decrease oil and fuel consumption, as well as help restore the engines compression. Engine cleaner used to flush away deposits, varnishes, and residues produced during normal operation. Safe in gasoline or diesel with or without a turbo charger. Decreases oil and fuel consumption and help restore the engines compression. TYPE OF USE: Before each oil drain, add one can of MOTUL ENGINE CLEAN to the hot used oil in the engine oil compartment. Let the engine idle for 15 minutes. Drain the oil, and change the oil filter.; The content of one can is sufficient for an oil capacity up to 5L. For higher capacities, 60ml of MOTUL ENGINE CLEAN is to be added per additional liter of engine oil (over 5 liters). Do not exceed the recommended proportion. If necessary, proceed with 2 successive treatments.