I have a large barrel of sae 15w-40 API:sl/cf, ACEA: A2/B2 multigrade motor oil, is this close enough to what the zx12 manual recommends, SAE 10W-40, 10W-50, 20W-40 or 20W 50 API: se sf or sg class?

Thanks
G

[Edited on 25/4/09 by macspeedy]

Yes as above

Just don't put Car Oil in a sports bike engine.

get the proper stuff

will do

cheers

G