The Mustang Forum for Track & Racing Enthusiasts

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  1. Keags5.2

    High Compression Engine Break-In

    Currently waiting on my new engine from RPG. Looking for experience/opinions with breaking in high compression builds and which fuel to use. I've read/heard from the engine builder not to use E85 for break in as it can "wash out" the cylinders, less lubricative than gasoline and you want a...