Clutch in . No gas, Turn the key. On cold start or lukewarm start (sitting for an hour) it happens. On a hot start; ie turn off, wait 1 minute, turn on, the oil light goes off immediately.

No leaks, abnormal oil consumption, funky coolant or oil, etc. Possible clogged cat. Supposed to have had engine rebuild 20K miles ago.

I am new to this.