what should the oil pressure be on a 94 suburban 5.7
Oil pressure varies based on speed, etc., but typically engine oil pressure should be in the 40-70 psi range. Higher speeds will mean higher oil pressure, but even at idle the pressure shouldn't regularly drop below 30.
I HAVE 1999 GMC SUBURBAN 332000 MILES. OIL PRESSURE AROUND 30 WHEN CRUSING. ANY PROBLEM WITH THIS?
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