However, a generally accepted range is 20-50 PSI at idle and 40-60 PSI at operating temperature and cruising speed. Pressure will rise with RPM.
Crucially: Don't just focus on a single number. Pay close attention to the *trend* of the oil pressure. A sudden drop in pressure is a serious problem requiring immediate attention. Consistent low pressure (below the lower end of the acceptable range) also indicates a problem.
Factors affecting oil pressure:
* Engine wear: Worn bearings, rings, or other internal components will lower oil pressure.
* Oil viscosity: Using the incorrect weight oil for the operating temperature will affect pressure. Too thin, and pressure will be low. Too thick, and pressure may be excessively high (also a problem).
* Oil pump: A failing oil pump will reduce pressure.
* Oil filter: A clogged oil filter will restrict oil flow and reduce pressure.
* Relief valve: A faulty relief valve may prevent pressure from building to the appropriate level.
If your 454's oil pressure is outside the general range or is exhibiting unusual behavior, consult a mechanic to diagnose the problem. Ignoring low oil pressure can lead to catastrophic engine damage.
