Anyone running lighter weight than 20w50?

[Bobby Shaftoe]

Any recommendations for something lighter than 20w50. I've been running Valvoline VR1 for years but i upgraded the cam last year and now i've got 6000rpm peak power and a 6500rpm redline. Oil pressure is 65psi up there which is a little higher than i want seeing as it puts an extra strain on the dizzy oil pump drive gear.

[Bobby Shaftoe]

I think the cam & lifter problem is part low ZDDP oils and part ste quality lifters from a certain blue box supplier.

Anyway my google fu is weak, anyone know a high ZDDP 10W40 off the top of their heads?