Before each oil drain, add in the engine a can of ENGINE CLEAN to hot used oil. Let the engine run at 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 5 liters. For higher capacities, 60 ml of ENGINE CLEAN is to be added per additional liter of engine oil (over 5 liters). Do not exceed the recommended proportion. If necessary, proceed to 2 successive treatments. Combined with DIESEL SYSTEM CLEAN or FUEL SYSTEM CLEAN, ENGINE CLEAN provides a very appreciable reduction of pollutants emissions to pass Vehicle Inspection. SECURITY Refer to the MSDS sheet and the information mentioned on the product label.