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Message: <blockquote data-quote="deck60" data-source="post: 90540" data-attributes="member: 2281"><p>so my machine has just shy of 4000hrs on it it has had lots of hard use but well maintained here lately I have noticed that the oil pressure light comes on so I installed a manual gauge in the cab when the light comes on the engine is warm and about 16psi ---- cold about 60psi the 16-20 psi ------ I have been running synthetic oil in for the last 3 or 4 years I bought a jug of rotella 15-40 non synthetic to try to see how it works ----- my question is what does this engine run normally and where should I shut it off and rebuild it I have a friend that is a retired engine builder and he claims a engine under normal load can live at 10psi for a long time just don't let it get lower than that under load</p></blockquote><p></p>