I have a 99 S10 2.2l and changed my oil and now my oil pressure gage
reads vary high when started almost to 80 psi and once I have let it
worm up it goes to 60 psi and idles at 40 psi is this to high of oil
pressure at start up I have changed to 10w 30 from 5w 30 with only
85000 miles on my truck
5W30 (or 5W20) is recommended for about all new vehicles today. Going to a
higher viscosity on the low side causes higher startup pressures and is hard on
seals, gaskets, and will delay upper cylinder lubrication (engines have smaller
oil passages than in days of old. Anyway, most vehicles have oil pressure relief
valves that divert excessive oil pressure, so the engine won't have a "stroke".
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