Real Oil Pressure
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Post Fiend
Joined: Jun 2001
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From: Running Springs CA
Real Oil Pressure
Since I converted my oil pressure sender to a real one, I wanted to know what the gauge calibration is. There are no numbers on the factory gauge. So, I temporarily hooked up a mechanical one and went for a drive. This is a 5.0 with over 120,000, 15W-40 oil and Motorcraft filter.
Max oil pressure seen: 60psi. It seems to be regulated to that.
Cold idle: 50psi
Cold cruise: 55psi
Warm idle: 40psi
Warm cruise: 50psi
Warm full throttle: 60psi
That explains why the stock gauge does not move as much as I thought it should. 40-60 is the total operating range.
It looks like I could run much thinner oil, if it weren't for the leaks.
Jim
Max oil pressure seen: 60psi. It seems to be regulated to that.
Cold idle: 50psi
Cold cruise: 55psi
Warm idle: 40psi
Warm cruise: 50psi
Warm full throttle: 60psi
That explains why the stock gauge does not move as much as I thought it should. 40-60 is the total operating range.
It looks like I could run much thinner oil, if it weren't for the leaks.
Jim
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Real Oil Pressure
I have an analog gauge on my 2000 ranger and it moves a great deal from 25 on up to around 70psi. Of course this depends on what speed rpm I am pushing. I think the max on my gauge is 80, I don't think I got the 100 psi max gauge.
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Real Oil Pressure
Originally posted by greenpus
I have an analog gauge on my 2000 ranger and it moves a great deal from 25 on up to around 70psi. Of course this depends on what speed rpm I am pushing. I think the max on my gauge is 80, I don't think I got the 100 psi max gauge.
I have an analog gauge on my 2000 ranger and it moves a great deal from 25 on up to around 70psi. Of course this depends on what speed rpm I am pushing. I think the max on my gauge is 80, I don't think I got the 100 psi max gauge.
New User
Joined: Feb 2003
Posts: 17
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From: California
Real Oil Pressure
I also think it could be relevant to include reference to the type and weight of oil used AND the oil filter used.
Some oil filters are better known for their quality construction than others and it seems prudent to consider that leaking relif valves on cheap filters could be contributing to oscillating oil pressure indications.
Please continue to include reference to engine mileage.
Congrats for those that have high mileage and good oil pressure. That would seem to me to be an indication of well cared for engines that one could expect to have a long and healthy life.
My personal goal is to get several hundred thousand carefree miles out of my trucks/cars. It would be nice to chose to replace my vehicles because I want a change rather than having to as a result of engine/drivetrain failure.
And it appears that use of quaklity oils and FILTERs has an effect on longevity.
-Cajun
Some oil filters are better known for their quality construction than others and it seems prudent to consider that leaking relif valves on cheap filters could be contributing to oscillating oil pressure indications.
Please continue to include reference to engine mileage.
Congrats for those that have high mileage and good oil pressure. That would seem to me to be an indication of well cared for engines that one could expect to have a long and healthy life.
My personal goal is to get several hundred thousand carefree miles out of my trucks/cars. It would be nice to chose to replace my vehicles because I want a change rather than having to as a result of engine/drivetrain failure.
And it appears that use of quaklity oils and FILTERs has an effect on longevity.
-Cajun
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Joined: Aug 2003
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From: New Jersey
Jim, awhile back you asked what readings I was getting. I finally hooked up an electric gauge to my 5.0 and was surprised to see that I have 75psi on startup and while cruising. After the engine is as hot as it can get, I show about 50-60psi at idle. Should I trust these readings to be pretty accurate? I'm starting to hear that mechanical gauges are the more accurate choice. Thanks!
-Mike
-Mike
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Laughing Gas
Joined: Mar 2003
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From: Colorado, U.S.A!
Cajun, I believe the relief valve that regulates oil pressure is in the oil pump, not the filter. The filter does have an anti drainback valve that can affect how quickly pressure comes up after starting the engine, but it does not affect operating oil pressure.
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Joined: Mar 2003
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From: Cloud USA
The gauge you have in your truck isnt a real gauge. If it moves a bit that is just voltage fluctuations. They will read the same anything above 6psi. If it is less than 6psi the gauge wont read at all
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