Quote:
Originally Posted by Surly73
Not saying you're wrong (at all) - but why does it seem like only the front was revised for 7/2011? Although I'm looking around again (trying to get RealOEM to show me rear fluids recommended before/after 7/2011) they may have updated it but still not to G2. If front and rear are 'the same', as you assert, why aren't they just "the same" after 7/2011 and both G2? Bimmercat tells me rear was OSP pre-7/2011 and G1 post-7/2011. Bimmercat says front was OSP pre-7/2011 and G2 post-7/2011.
[ Actually, that's the first that any of the parts systems said OSP was acceptable at any point in time in front and rear. I don't think it said that last year when I looked everywhere looking for answers. The fact that bimmercat shows OSP in use in front and rear pre-7/2011 would have been nice to see last year  ]
Thanks for your post!
EDIT: it doesn't cover front diffs and G2, but the write up at https://www.bimmerworld.com/About-Us...ferential-Oil/ is a nice break down, assuming it is technically accurate. |
After 7/2011, BMW went from SAF-XO in rear to G1 in rear. Pre-7/2011 is SAF-XO, post 7/2011 is G1. G1 is a GL-4 gear oil. BMW most likely specified G1 because they didn't want to risk corrosion on any yellow metals/aluminum, but modern aftermarket G1 oils have enough inhibitors to not be an issue.