Originally Posted By: Jozef
So can somebody recommend me group III synthetic oil with 502.00 specification which I can use for both phases?
You're no longer under the manufacturer warranty, so you shouldn't be that concerned about sticking to 502.00 spec. If you're so concerned about sludge, then running a non-502.00 oil for a few thousand miles is not going to cause you problems.
I was in a similar situation with my 530i. I ran PP 10w-30 with ARX, even though that PP does not carry the BMW LL-01 spec.
Where are you from, Jozef?