Hi
I would use a 5w-40 synthetic.
5w-40 engine oil | 5w40 oil
Out of those, the best ones are the Fuchs/Silkolene Pro S, Millers CFS/CFS NT, Motul 300V, Redline and Gulf Competition. The Motul 8100 X-Cess, Millers XFS, Fuchs GT1 XTL/Supersyn, Shell Helix and Mobil Super 3000 are good, cheaper alternatives. If it's used on track or you just want the best, go for one of the better ones I listed.
Cheers
Tim
The most experianced b20 builder in the country told me 10-40.
Hi Tom
It's fine to use, but it's likely to burn off quite quickly as it's quite thin.
Cheers
Tim
thinking about getting fuchs oil again,
which oil do you recommened for a b18c ek9 wont be used to track until march ?
i think it was the 10w-40 i had last time.
it does'nt have to be the fuchs. what would you recommend ?