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  1. H

    M1 5W20 High Mileage in a NEW car

    No doubt. I'm in it for about a buck a quart :D
  2. H

    M1 5W20 High Mileage in a NEW car

    Well, I have a stock of the 12QT boxes of M1 5W20HM from the walmart fest last year, 60ish quarts... And a 2K mile 2021 Mustang GT. Would you hesitate to run in in this car? Or maybe just unload the oil cheap on marketplace and run with Castrol Edge or similar, non HM?
  3. H

    Mechanic won’t use oil I’ve chosen

    Personally, he wouldn't be touching my vehicles. He WILL NOT change. There has to be another place or person you can hire as fleet maintenance manager
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