Hello, I am new to the site and first time camaro owner. don’t know much about the car yet, trying to learn as much and as fast as possible. I have a 69 Convertible with a 327 in it. the previous owner installed the Z28 gauges in it and thanks to that I can see that the oil pressure gauge runs very high. idle at around 40-50 and runs and around 75 close to 80. first of all I don’t know if the gauge is even accurate. so I need suggestions and questions as to what to check to figure out why is it running that high. Oil looks clean, but I am think of changing it anyway and putting in a lighter weight oil (any suggestion on how light)?