[F87source]

Originally Posted by edycol

HPL is not that user friendly.
You can contact Dave at HPL through BITOG to talk options.
He even cooked specific oil for one BITOG member. Check with him what he recommends. I talked to him to try their product instead of Redline D4 (which I am very happy with).

I see, ok I will reach out to him.

[LLB-M2]

I allready bought oil for gearbox and diff, but doesnt have time to change it. Ok, the M2 sleeps in the garage so it doesnt matter.

Diff:
ROWE HIGHTEC HYPOID EP SAE 75W-140 S-LS

Gearbox:
ADDINOL ATF DCT (BMW MTF-LT5)