Re: AU i6 & V8 engine oil, what are you using & are you happy with it?
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mine are 60 psi cold start at idle with both oils and normal driving at operating temp is around 40-45psi, in extreme conditions as in hard running on hot days the hpr10 does drop into the low 30s sometimes high 20s at idle.. the hpr 15 seems to stay in the high 30s low 40s psi when hot...
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