oil pressure problem

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Sep 11, 2011 | 01:14 PM

proia

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oil pressure problem

i have a 95 4.9l when cold oil pressure is 45psi when hot pressure is between 20-30 psi driving and at idle 12-15psi i change oil alot 20-50 sae truck has 255,000 mi.

Sep 11, 2011 | 08:21 PM

F-250 restorer

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Are you making us wait in suspense before you actually ask a question?

Sep 11, 2011 | 10:23 PM

piglett

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From: new hampshire

Quote:

Originally Posted by proia

i have a 95 4.9l when cold oil pressure is 45psi when hot pressure is between 20-30 psi driving and at idle 12-15psi i change oil alot 20-50 sae truck has 255,000 mi.

sounds like the old engine mite be well worn. what brand of oil have you been using & how long have you had the truck? also how many miles have you put on it in the time you have owned it

piglett

Sep 11, 2011 | 11:35 PM

52 F-1

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That sounds normal to me, actually really good considering the mileage though i might expect higher with that thick oil if it had less miles.
The oil pressure is usually higher at start up then drops when the engine heats up and the oil pump doesn't spin as fast at idle but the passages are still the same size so its obviously going to drop a lot there, though at idle it doesn't need as much pressure either.