I was wondering what is the normal operating pressure for a 5.3L V8 in a 2000 Chevrolet Tahoe. MY oil pressure guage goes close to 80 when I accelerate, but it operates near 60 psi. I was wondering if this was right. When I drove a 2005 Chevrolet Silverado 5.3Lv8, the oil pressure guage didn't operate at those levels. It operated at new 40psi and when you accelerates it went up to near 60-65psi. I was wonderign if this is normal or if soemthing my be wrong with my truck. Thanks a lot. BY the way my truck has 103,500 miles on it.