Scott, You should be running 20/40 or 20/50 oil in the car. With the proper gauge the pressure should reasd a little below 80 and at a hot idle just a little below the center line. I show the proper fit and range on the web site.http://www.specialtauto.com/engine.shtml John hervey << I just made a climate move from NC to Fla, and since then I have noticed a peculiar problem. When the car first starts, the oil pressure reads fine, around 45-50..but after about 25 minutes of driving, it almost reads 0. The oil level is fine, and there aren't any major leaks...anyone else have a problem like this? Is this possibly a faulty gauge? Thanks! Scott >>