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elwood · 06-18-2004, 11:00 PM

I have a '78 C20 with a rebuilt 350 and 700R4, I use Valvoline 10w30. At highway speeds it produces around 30 psi of pressure, and when it's at idle it produces around 5 psi. I have used 20w50 and it raised just a little bit, but not that much, I have installed an aftermarket mechanical guage to verify this.

Is this pressure acceptable? If not, what is the problem?

06-18-2004, 11:00 PM	#1
elwood Keep it gangsta! Join Date: Dec 2003 Location: Peoria, Arizona (Phoenix Area) Posts: 102	Oil pressure...how low is too low? I have a '78 C20 with a rebuilt 350 and 700R4, I use Valvoline 10w30. At highway speeds it produces around 30 psi of pressure, and when it's at idle it produces around 5 psi. I have used 20w50 and it raised just a little bit, but not that much, I have installed an aftermarket mechanical guage to verify this. Is this pressure acceptable? If not, what is the problem? __________________ 1984 K5 Blazer 305-NP208-700R4 Ex Police Unit It's old school, but moves along nicely... '78 C-20 - SOLD