Reduce blue exhaust smoke and minimise oil loss with Nulon Engine Stop Smoke. Formulated with hi-tech polymer technology, Nulon Stop Smoke seals piston rings and valve guides to prevent oil from making its way into the combustion chamber, reducing exhaust smoke and oil burning. The extra thick fluid design also helps to boost cylinder compression, increase oil pressure and quieten down engine noise. Suitable for use with all petrol, diesel and LPG engines and is safe to mix with all oil types including mineral, semi-synthetic and full synthetic blends. 1 bottle of Nulon Engine Stop Smoke will suit most 6 and 8 cylinder vehicles, for smaller 4 cylinder engines use ½ a bottle. Nulon Stop Smoke should not be mixed greater than 10% of the engine oil capacity.