Quote:
Originally Posted by 9krpmrx8
BMW has always recommended ridiculously long OIC's and many older BMW owners can tell you how that worked out. Now 6000 mile OIC's may be fine with a group 4 or 5 synthetic 40 but a 30 is too thin for a boosted engine IMO long term at that OIC. But there are a lot of factors.
Remember manufacturers don't recommend the best performing oil, they are more focused on meeting emission and mileage standards, etc.
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Makes sense, so what do you recommend using?