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Author Topic:   oil pressure

Posts: 79
Registered: Jul 99

posted 05-30-2001 02:20 PM     Click Here to See the Profile for Harley     Edit/Delete Message   Reply w/Quote
What should the oil pressure gauge be reading in my 89 5.0? I'm getting some inconsistent readings.

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Posts: 133
From: s. holland, il usa
Registered: Nov 99

posted 05-30-2001 03:41 PM     Click Here to See the Profile for jimb   Click Here to Email jimb     Edit/Delete Message   Reply w/Quote
Mine oil pressure guage doesn't have numbers but it reads in the middle of the range to about 2/3 when crusing and no lower then 1/3 of the range at idle. This is with 5W-30W synthtic oil. I will be changing to 10W-30 for the summer very soon.

93 Cobra 'R' #58

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Posts: 79
Registered: Jul 99

posted 05-31-2001 03:25 AM     Click Here to See the Profile for Harley     Edit/Delete Message   Reply w/Quote
My gauge is the same as yours. Most of the time it's right at the halfway mark. Others it's just below, but not necessarily at idle. With the automatic overdrive and the motor running at fairly low RPM at cruising speed, would that knock the oil pressure down a bit?

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Posts: 1363
From: Lusby, MD, USA
Registered: Jun 99

posted 05-31-2001 08:18 AM     Click Here to See the Profile for GTRocks   Click Here to Email GTRocks     Edit/Delete Message   Reply w/Quote
My '93 with AOD runs at about 2/3rds at idle, and possibly as low as a 1/2 at load. I don't think it's ever dropped below 1/2 though, unless it is low on oil.

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Posts: 13
From: Bridgeport CT
Registered: Mar 2001

posted 05-31-2001 11:51 AM     Click Here to See the Profile for tonym   Click Here to Email tonym     Edit/Delete Message   Reply w/Quote
quick note, throw a mechanical gauge on it. stock gauge isn't too reliable... i think they are for looks only.... it is nice to have 10lbs for each 1000 rpms.

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Posts: 1073
From: Lyons, ILL, USA
Registered: May 99

posted 06-05-2001 04:56 PM     Click Here to See the Profile for Capri   Click Here to Email Capri     Edit/Delete Message   Reply w/Quote
10 Lbs for each 1000 rpms??? I dont think so. That would mean 60 lbs at 6000 rpm and thats about the end for a 5.0 motor stock. Im sure you mean something else by what you are saying.
My car at Idle, is at 50-60lbs. Until the oil gets hot, then its about 35-40 which is good for a race motor with lightweight racing synthetic oil. Stock oil pressure should be the same unless you have a High Volume pump stuck in the motor. Then it will be a tad higher. On your electric guage in the car, if the guage moves, you have oil pressure. Period. The higher you rev the motor, the higher it should go up to a point. If you rev it up and the guage doesnt move at all, listen for noises, and check your connection on the Oil pressure sending unit.


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