2x STP Smoke Treatment for Petrol Engines - 450ml 64450EN06 New\n\nSTP\u00AE Smoke Treatment is specially formulated for petrol engines to reduce excessive exhaust smoke, oil consumption, and engine noise caused by wear. It creates a thick, protective oil cushion that helps fill gaps between cylinder walls, piston rings, and valve guide seats, reducing oil blow-by and protecting against further engine wear.\n\nIdeal for high-mileage and worn engines, helping to extend engine life and improve running performance.\n\nKey Benefits\n\n--\n\nProtects against engine wear\n\n--\n\nReduces excessive exhaust smoking\n\n--\n\nLowers oil consumption\n\n--\n\nHelps reduce engine noise\n\n--\n\nCreates a thick, protective oil cushion\n\n--\n\nCompatible with all petrol engines\n\nUsage Directions\n\n--\n\nAdd the entire bottle to engine oil when the engine is warm\n\n--\n\nCan be added during or between oil changes\n\n--\n\nOne bottle (450ml) treats 4\u20135 litres of engine oil (10% treat rate)\d