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turbo install

  1. Is it necessary/better for car to change the oil twice before turbo install, per WIS?

    9-5 Workshop
    1. I've read several threads regarding the Turbo change, most of them say to change the oil before the turbo replacement and some say in the middle of it. The WIS states to drain the oil, fill it up, run it til the thermostat kicks on, then drain the oil AGAIN and refill it. Seems to me this is...