[greenamex2]

Has anybody out there used either Millers Oil CFS 10/60 or the new Shell Ultra Racing 10/60?

The grades seem to suggest a major contribution to my high temperature oil pressure reduction 'problem' due to the overly large clearances required for 9500RPM, but not adding too much drag when trying to start the thing or risking blowing the oil seals when the engine is cold (sorry about all the oil I dropped this year, now solved that one with an oil pump seal retainer, thanks PACE).

I am currently using Royal Purple Racing 41 (basically a 10/40) which is an excellent oil and the engine hasn't blown up yet but, as always, I am seeking improvements.

And yes, I know that reducing oil temperature would be better but there is a limit to what you can do with a wet sump 9500RPM 218BHP 1600cc engine, and I have pretty much done it all.