Quote:
Originally Posted by ajc209
Yes!
Pressures are quite high cold as it is really. At 100C on 0w20 it gives a perfect 10psi/1k so thicker oil is too a compromise....
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You're right, however he was asking about pressure at cold. I can't answer this definitively. The reason is that on the cars where I've shimmed the pump, I've only witnessed a small increase in pressure at start up @ idle when cold.
A small shim (small pressure bump) and a 0w-30 may be an excellent compromise for double duty (track/DD) car. But shim or no shim, it's always, ALWAYS, best to let your car warm up before you rev it high or drive it hard.
