Yesterday I noticed a drop in oil pressure. Today I was tuning, and over about a hour of doing this I watched the pressure drop about 20 psi. Sit around 40 when driving, drop down to about 30 at idle. Should be around 50. Until I figure this out SSExi is grounded. This is how the last engine was lost.

First thing I'm going to do is drop the oil pan and inspect the screen on the pick up tube. My thought on that is that it'* getting clogged up over time. When I shut it down the pressure will be higher then when I shut it off. I'll be getting on this early next week when I have off work. I needed to replace the oil pan gasket anyways.

If that don't fix the problem then I may have a defective cam. I'll cross that bridge when I get there.

This same exact thing happened to me, im pretty sure its because its getting warmer out and I still have 5w-30 oil in there which is what I use during the winter. Before you go all out and tear your car apart try 10w-30. If it already has that then well I did all I could LOL

It'* still in the 40s here. and I installed a 160* thermostat. Dropping the oil pan isn't that big of a deal. And it'* something I wanted to do, I'm just doing it a little sooner.

thought your car was in jail anyway

Hmm... bummer dude!

Although IIRC 30 is about what mine runs at idle once it'* completely warmed up?

I just want to make sure nothing is wrong. A gasket is easy to change.

Yes, my car was bad and went to jail yesterday. But got out because it scared the other inmates.

my car is just over 40 when driving and just under 40 when idling

I support the pan gasket/check screen and that oil pressure tester you linked.