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Guys
I am a new RS4 owner and have a question about oil. Audi sold me Castrol SLX, Proffessional Powerflow, Longlife111 5w-30 (at a stupid price) A friend at a motor factors has checked via the reg No and it comes back with Castrol Edge, long life fully synthetic 5-w30. Are the two oils compatable if not which one is correct

Edge is correct,not sure about the other you mention.

Castrol Edge is the Consumer Retail name for Castrol SLX III Powerflow. They are both 5W-30 VAG 504.00 507.00 spec oils and are usable in VAG longlife servicing cars.

same oil no difference

I've used both - power flow from the Audi dealer and edge from halfords...