The 235 was before my time - not even sure if they're OHV, so I don't know how similar to the 250/292's they are, but your info is interesting. I usually T in a cheap-o mechanical gauge, and my I-6's show what I have thought was frighteningly low oil pressure. with 10W40 cold start it goes up to 40psi, stays 40 on the hyway, but drops to about 15 at hot idle. The OEM electric disagrees and says 60 and 30 respectively. I always just thought I had crappy gauges. Even published spec's dont seem to agree - My '84 GMC manual says should be 60 at idle (really - a typo?) but the old story I've heard is 10psi per 1000revs and seems to reflect observation. After all these years I still don't know what I should really be getting at the sender. Guess I'll average out all your recordings and stop obsessing over that needle - but 292's are getting so rare here.
