Shop 27 engine oil additive from 3 trusted brands including LIQUI MOLY, MOTUL, VALVOLINE. Compare prices, check vehicle compatibility, and get free delivery on orders over £99.
Engine oil additives are chemical compounds added to the engine oil to enhance its protective properties. They can reduce friction, clean deposit build-up, seal minor oil leaks, and improve high-temperature stability. Whilst additives are no substitute for a proper oil change, they are useful for high-mileage engines or as a stop-gap measure between services.
Different additives address different problems. Using the correct product for your engine's condition ensures the best result.
Not all additives are compatible with every engine or oil specification. Using the wrong product can reduce oil performance or damage seals.