Quote:
Originally Posted by THE TECH
Doesn't matter how close it is. The BMW manual clearly states that no other oil should be used unless it is an emergency situation.
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BMW has a working relationship with Castrol. Translate that to business relationship. Interpret that any way you like. That Mobil 1 is good oil and I would venture to say probably better than the TWS BMW recommends for our cars. I'll stick with Redline; Thank you very much. 5W-30 mixed with 40W race.
All that being said, if you take decent care of your car you could probably run dino oil in it and make it last 150k miles. You'd just have to change it out more often.