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For anyone else reading this, an "engine flush" can be done by draining the old oil, filling up with new oil, going for a quick 100 mile drive, then draining and refilling again. It's not quite as thorough as a chemical flush, but it doesn't destroy the motor either.


It sounds to me as though they didn't put (enough) oil back in after the engine flush. First of all, it didn't need an engine flush. Mobil1 and other synthetics are renowned for not leaving deposits in the engine. I would bet your engine would have been sparkling clean on the inside. They sold you something you didn't need. (I'm betting something along the ...

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