Low oil pressure?

RAMM said
I've installed 2 oil temp gauges in older vehicles and my 2011 RAM has this information along with trans temp. Highway driving @ 1800 rpm and the oil gets hot--get off highway oil cools off. It's not a moot opinion its a fact backed up by multiple observations of this many times. This is especially true when on the dyno. Let the engine idle and oil temp will never come up. Put 2000 rpm and some light load on it @ 60-80 hp and oil will come up relatively fast. I've seen 70-80 cold idle pressure drop to 15 or so when oil is hot--this happens when clearances are loose. The HV pump and thick oil are actually exasperating the problem. Don't believe me? Don't care. Hook up a gauge, see for yourself. J.Rob

p.s. It's not air in the line either.

Relax Rob, it’s my opinion that is moot, not yours. I believe your truck gauge but we’re not talking trucks and most definitely not dynos, nor a cold engine startup and idle. What I’m saying is that with a hot engine on the highway, cruising, which you personally observe causes hot oil, the oil temp will rise when you take cooling airflow away, like when you pull off the highway and immediately stop.

As for air in the line - it has to be a lot of air. It will cause problems. Mostly the gauge will be slow to respond and cause minor inaccuracies. Boyle’s law says so.