Very weird experience this afternoon. First time I have ever driven my 1972 CP, complete restoration car. Oil pressure started off at 80+ psi and dropped away as expected as it warmed up. However, as I continued on a 6 mile trip, the oil pressure dropped further until zero and the oil warning light came on. Stopped and checked oil level - at the lower end of the accepted scale but the oil had been circulating around the engine and I didn't wait for it to drain down. As I was only 3 miles from home I decided to try and get home. Started it up and the oil pressure returned to 60 psi at 2000 rpm. No issues on the way home.
Really confused as the gauge and warning light operate separately. Blocked gallery near their measuring points that cleared?
Welcome any thoughts.