questions from new member

[oldvet]

Hi: I just purchased a '94 Silverado with (supposedly) 14k on a new engine & trans. I have the paperwork on the trans but not the motor, so I'm skeptical. Any way the problem is that when cold the oil pressure is 60-70, then after warming up it will drop to 45-50 while in gear and moving but drops to about 20-25 while at hot idle. I've read posts on here that say that's OK and others that say 20-25 is pretty low-I'm confused-also I would think that is pretty low if the engine is as new as I was told it was. Any advice would be appreciated as I love the truck and would like to keep it awhile. How about synthetic oil? would that increase the hot idle pressure? Thanks in advance!

[Shaners]

Your oil pressure is perfect for what I assume is a 5.7L. I believe 10psi (or above) per 1000RPM would be considered "normal".

 

The newer engines (4.8,5.3,6.0 and 8.1L) have higher oil pressures due to their design...

 

Welcome to the forum!!!

[JayMan]

I second Shaners reply!

 

Are you checking the oil pressure with a good gage? I'm leery of the OEM gage cluster. When in doubt, use an Autometer mechanical oil pressure gage.