I washed my engine this morning. Simple Green and a garden hose with a jet nozzle. Looks like new! After completely soaking everything the engine it turned over instantly. I have to believe a clean engine runs cooler and I will spot any leaks easier, sure looks prettier. I like looking at engines. Now days everything is hidden. Now if there was only some chrome valve covers or an air cleaner to shine?

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2013 X5 3.5i M Sport
2004 M3 cabriolet SMG