I just purchased my '15 328i, so it's running whatever oil they put in last or as part of their CPO reconditioning. Now I don't believe the oil will be okay for 10K miles ( a year's driving for me), not in the long run. So I plan changes every 5K miles with whatever BMW LL-01 oil I can find at a reasonable price.
Right now WM has the Castrol 0W-40 with the certification, $27/5 quarts, but I hear Castrol is phasing out the oil with the certification. So I plan to grab one big jug (and a quart extra for topping off), hold onto it and the oil filters I've ordered from FCPEuro, and bring the stuff to my regular mechanic in August or so at 30K miles. I'll have him do a brake fluid flush and cabin filter change as well, and change my own engine air filter.
By that time the car will be out of factory warranty. Should I continue with BMW-certified oil during my year's CPO warranty, or will Mobil 1 do as well?
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