Oil pressure

[rx7danny]

Just fitted digital pressure gauge and probably bad idea to know what\'s going on
Tick over 40 to 50 pounds but when load engine will steadily drop to25 is this something that happens on Rex or faulty oil pump or badly wired gauge
Thanks for help danny

[Jono FD3]

With mine at cold start it\'s about 75-85psi
running temp driving about 40psi
running temp idle about 20psi

Jono