I have noticed that as the weather has gotten hotter here in SC that after warming up my oil pressure goes to almost 0.
On a cold start up the pressure is at 30 psi and then after a driver or idling in the drive for about 25 minutes or so the pressure slowly drops to what I can only guess 2 or 3 psi.
I am running Valvoline VR1 Racing SAE 10W-30 High Performance High Zinc Motor Oil based on a recommendation I got since it has high Zinc levels.
I can see the needle drop some when I shut it off and this is why I think it does have some oil pressure.
Image 1 is with the truck running after warm up and image 0 is after I turn it off, you can see the needle does move. Image 2 is while drive after the needle is almost on 0 and image 3 is cold start up.
Any advice would be greatly appreciated.
This is the original 235 engine and it runs strong and does not smoke at all. I don't know any more then that about the engine, as in rebuilt or not or millage. I have had it about a year with no issue and roughly 500 miles
