Hi
IA 5w-40 will be best unless heavily tuned.
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, Gulf Formula G, Shell Helix and Mobil Super 3000 are good, cheaper alternatives.
Use the code BLOWOUT for 20% off until Sunday.
Cheers
Tim