Why is my trucks oil pressure high?
Why is my trucks oil pressure high? The resistance the oil faces in flowing through a partially or completely obstructed passage could be one reason for high oil pressure. Changing the viscosity grade to a thicker or thinner oil has an effect on the oil pressure. If the oil is too viscous or not viscous enough, it might be the wrong oil for your engine. What should the oil pressure gauge read for a 5.3L? From some of your other post's I'm going to guess you have the 5.3. Normal warm engine oil pressure readings on that engine are between...