low oil pressure take 2 should i worry

[bottomlinesf]

i hooked up a pressure gauge to the truck when i started it was around 45 to 50 psi. when it was warmed up i had 8-11 psi on the gauge. should i worry about it? i know the gauge i got is on the money cause i use it to tune the gauges on diesels engines.

the truck got about 130,000 on it should i goto a heavier oil and what weight.
right now i got fresh 5w20 valvoline full synthetic with a new sensor.

 

[fourwheelford]

I thought I read somewhere that that range is ok but I don't totally remember, what happens when you rev it up with the gauge attached?

 

[cbxer55]

I do not care what the manual says, or what other folks say,
I have run Valvoline 20W-50 oil in my truck since day one. Have over 100,000 miles on it now and even the Camshaft Synchronizer looks to be in good shape. Of course I take the Camshaft Sensor off and pour some oil down there quite frequently, so that may be why.

But I have not had a lick of trouble with the engine since I bought it with 20,000 miles in 2002. External problems not oil related, YES! But mine runs quiet, smooth and gets around 20 mpg, which is good to me for a 3.0.

I do not know what pressure mine runs at. One day I will hook up a gauge and probably be shocked. But I would not be overly concerned about low pressure while idling. What is it like once moving? Thats the question.

 

[Runnin'OnEmpty]

What's that old rule about oil pressure?
Ten lbs of pressure for every 1000 rpm,
I think that's right.

Bottomline, according to that rule you're right
on as far as oil pressure goes, even with the
5w-20.......

Now if you had only 5-10 psi when running
at highway speeds, that's another matter.....

Ford's 'switched' gauges are set at about 5 psi,
so anything above that is considered 'normal'.....
Scary, huh....?