Driven break-in mineral oil is a low-detergent, high-ZDDP formulation designed to protect an engine during the critical running-in period. It will protect all types of valve train, including those using very high spring pressures and also help create the best ring seal in the block, which is key to good compression figures. Effective running-in can be achieved by up to two hours on the dyno/competition use or 500

road miles.

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