Originally Posted by JAJ
I have read that the BMW Approved product is ester-based (it's a direct competitor to ELF and Motul ester racing oils) while the non-approved formulations are PAO based.
That'd make it a group V then, which is the best. Interesting. Can somebody confirm this? Just curious.
The other reality is for folks like me, who drive 5K miles a year, rather than 15K, it makes little difference. When you start stretching oil changes is when a better oil starts to make a difference. I'd never go over 7.5K miles regardless of oil, like most folks adhere to here.