LL-01 and LL-04, What's the Difference? (For a 335i)
I was looking at the back of a quart of Mobil 1 0W-40, and it states that it is "BMW Longlife 01" which i assume is LL-01. My question is, what is the difference between LL-01 and LL-04? ___ BMW X5d (Ordered) 2007 335i Coupe (sold...