On the F4R in n/a form I found 10w60 was best for coping with track use and revs to 7500rpm. 5w50 worked ok too although the 10w60 seemed a little better. On the turbo the rpm is lower but you've got the added heat from the turbo. So what do people run for track use?
I suppose there's no dephaser to worry about with the oil getting thinner when it's hot on the Megane.
I used to run Millers 5w40, now it's on 10w60 on the recommendation of Paul at RS Tuning. He said anything over 300hp or track days go for the higher grade.
