Hi
You won't have any problems switching from semi to full synthetic and it's fine to top up with either.
The Fuchs Pro S, Millers CFS and Gulf Competition 5w-40 are all good for road and track use. Depending on how much track time it's getting, you may need to change more than once a year.
Cheers
Tim
You won't have any problems switching from semi to full synthetic and it's fine to top up with either.
The Fuchs Pro S, Millers CFS and Gulf Competition 5w-40 are all good for road and track use. Depending on how much track time it's getting, you may need to change more than once a year.
Cheers
Tim