yeah, the oil level is full and clean. I just got done checking the pressure with a mechanic style pressure gauge with a long hose. Once started the gauge went to 50 lbs at about 1200 rpm. Once the engine was warm the pressure settled in at 20 lbs at idle and a quick blip of the throttle brought it up to 45/50. Not sure which is more accurate, but the last test made me feel a lot better.
As mentioned before, oil pumps on 5.0's are either good or bad, so that would be the last place I would check for weak oil pressure. Factory gauges are also notorious for being highly inaccurate and I'm glad to see you did the tests again with an aftermarket Autometer.yeah, the oil level is full and clean. I just got done checking the pressure with a mechanic style pressure gauge with a long hose. Once started the gauge went to 50 lbs at about 1200 rpm. Once the engine was warm the pressure settled in at 20 lbs at idle and a quick blip of the throttle brought it up to 45/50. Not sure which is more accurate, but the last test made me feel a lot better.
As mentioned before, oil pumps on 5.0's are either good or bad, so that would be the last place I would check for weak oil pressure. Factory gauges are also notorious for being highly inaccurate and I'm glad to see you did the tests again with an aftermarket Autometer.
Now the factory spec for an 79-93 5.0L listed directly out of the shop manual states, 40-60 psi hot at 2,000 rpm is normal. I would say that 20 psi at idle is more then respectable as well. What grade oil are you running, you could always bump up to 10w40 as the motor may have been build with slightly looser tolerances, but without actually tearing down the motor and measuring with plasti-gauge you will never know.
-Craig
In that case it was 10W30, you could always try 10W40 at your next oil change.The car dosen't burn any oil. I have driven it about a thousand miles since I got the car. As far as oil grade is concerned, I should ask you Craig since this is your old car lol. The autometer gauge is probably not as accurate as the mechanical gauge (I hope). I was only seeing 25lbs when I was on the highway at 2k rpm with the autometer gauge, freaked me out a bit.
The car dosen't burn any oil. I have driven it about a thousand miles since I got the car. As far as oil grade is concerned, I should ask you Craig since this is your old car lol. The autometer gauge is probably not as accurate as the mechanical gauge (I hope). I was only seeing 25lbs when I was on the highway at 2k rpm with the autometer gauge, freaked me out a bit.
yeah, the oil level is full and clean. I just got done checking the pressure with a mechanic style pressure gauge with a long hose. Once started the gauge went to 50 lbs at about 1200 rpm. Once the engine was warm the pressure settled in at 20 lbs at idle and a quick blip of the throttle brought it up to 45/50.
That's more like it. Those are good healthy numbers so it seems that both the factory gauge and the Autometer gauge were faulty. Not often that happens. Perhaps the sending units of both gauges were bad.
If that is what it is, it still may not be as accurate as a mechanical gauge but at least your gauge will be working. QUOTE]
Never said it was as accurate as a mechanical gauge, just trying to save the man a little money. He's already shown us with the mechanical gauge that he has sufficient oil pressure.
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