| You can run 20-50wt if your minimum temps stay above 50 degrees. I ran this in my car this last week while still breaking in my car and what I saw was If I took off before really warming the motor (for like 5 minutes) the oil pressure went all the way to 120 psi if revving above 2500 rpm or so. I went to 10-40 and now am only seeing 90-100 psi when first starting. 120 psi worried me a little....... OPerating pressures were the same for either once the oil was up to operating temps. Brand new sending unit by the way
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