Quote:
Originally Posted by Green-Eggs
I don't think so. To look at a pressure gauge to know if you're seeing "extra wear" then you'd have to know what is normal pressure with normal bearings. Normal pressure will depend on oil temperature, RPM, oil viscosity (which itself depends on how long it's been in the engine), and whether or not the oil thermostat is open or closed. Then on top of that you've got a variable displacement pump that might compensate for some of those factors. I don't think this is a solvable problem to use oil pressure on the S65 to infer bearing wear.
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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.