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We've been using this since it appeared back in the late sixties. Whenever we built a engine for one of our competition cars we would assemble the unit coating all the mating surfaces, such as the crank journals and big end shells with STP in order to prevent a dry start when the engine was run up for the first time. Each bottle is filled to 30ml and you can choose from the petrol or diesel additive depending on your engine type.

STP Advanced Engine Oil Additive

£7.36Price
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