Quote:
Originally Posted by ThatWhiteM3
It does vary like you said based on rpm temp and other factors. But wat you do is find out for example pressure on normal cruising speed which will hold rpm in place. For example at fixed 60 mph in 6th gear would be 80psi and that would keep rpm at 3000rpm (just an example). Now u know what it is at that speed and that rpm. If there's a weariness then at the same speed and rpm pressure would be different.
|
You are correct.
You can easily establish a baseline from a healthy motor and from that point on look for oil pressure variations at various RPM. Note that oil needs to be at optimal working temperature (ideally 100C/212F) for this to work.
Even though more/less bearing clearance will show up on your oil pressure gauge, usually the difference is too small to be noticed, unless the change is big enough or you have a very accurate gauge. But it should work for your example.
I have my oil gauge alarms set to 2.8BAR (low pressure warning) and 6.2BAR (high pressure warning). It works for me. Have one; you'll like it.