Originally Posted By: B320i
Originally Posted By: edyvw
I think LL-01 has certain requirement when it comes to VANOS.
I'd be more inclined to say it meets the requirements for long drain and viscosity.
For example, a situation where I'd recommend LL oils is if you chose to use 5w30. If I walked into a shop and bought M1 5w30, then I would have a "Resource Conserving" oil, and thus something not compatible with my car. (Look around the BMW forums and you'll see people that did this and are concerned that their engine is making ticking noises)
If I had bought a 5w30 with the LL rating, then the oil is thick enough.
Now, the flip side of the coin is using Shell Rotella 5w40. Definitely thick enough - and 5w40 was typically an LL98 oil "back in the day." We know from from UOA its a good oil, so you can probably use it at a conservative interval quite safely.
End of the day, I see it this way:
BMW suggests their LL rated oils because they are designed to meet all the requirements of not only the engine, but servicing too. Maybe there are some boutiques that are better - however with this rating, you're practically guaranteed the oil will work for most everyday usage scenarios envisioned by BMW.
I also suspect there is more to the testing process and what requirements than we are aware of, too.
I would say there is much more to that then just stay in grade.
My friend used M1 5W30 "full" synthetic in his Audi A4 1.8T, and 80K later had a sludge bomb, although he chnaged oil every 5K.
If you ask me I would not use even LL-01 unless oil meets MB 2295 also. Same like in my oil burner, I use oil that meets both LL-04 and MB 229.51 and to preserve DPF oil that has VW 504.00/507.00 spec. since that spec is more stricter on SAPS then BMW or MB.