Liqui Moly Oil Smoke Stop 300ml - Prevents Blue Smoky Exhaust Fumes - 8901. This additive reduces oil consumption in gasoline and diesel engines by sealing piston rings and valve guides. It prevents blue smoke and oil mist, combats loss of viscosity in motor oil, improves sealing, reduces engine noise, and provides extra protection in engines with high wear. It also extends the service life of catalytic converters. Suitable for all types of gasoline and diesel engines and compatible with all commercially available motor oils. Not suitable for motorbikes with wet clutches. High shear stability. Stabilizes loss of viscosity. Prevents blue, smoky exhaust fumes. Application: One 300ml can is sufficient for 4-6 liters of motor oil. Do not add more than 10%. Add to warm motor oil during every oil change and between oil changes if oil consumption is very high.