That is part of the debate. No one really knows. Posts have been made that the LL-01 spec covers more than just the oils ability to stay in grade for 15,000 miles. It would appear that many people have gotten away with using non LL-01 oils...so the choice is really yours. I have occasionally strayed from using non LL-01 oils on rare occasions. In fact I have Mobil 1 5w-30 in my car now...but I never go more than 7500 miles.
Originally Posted by crazy4trains
To further fan the flames:
I don't plan to go 15,000 miles between oil changes. Likely will do 5,000 between changes, which is less than I have typically done on my other vehicles (every 10,000 miles with M1 5w-30). If I'm not trying to get "long life" from my oil, how badly does my oil need to meet the LL-01 spec?
As much of this thread shows, it is much debated, and "up to what you are comfortable with". BMW is clear on their recommendations...
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