Quote:
Originally Posted by BMWRNMD
So, you will put the Pennzoil 5W-30 in and then the dealer will put in the 0W-20 in on the free changes. Do you think it is safe for the engine to alternate oil viscosities like that?
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Oh no, I'm not using the dealership changes at all. Doing my own changes with 5w30 from here on out. I believe there's folks on here that do swap viscosities as needed from time to time. Some will use a heavier oil for hard tracking then swap down for day to day, or seasonal fluctuations.