* Engine RPM: Oil pressure is higher at higher RPMs.
* Engine Temperature: Oil pressure is generally higher when the engine is cold and decreases as it warms up.
* Oil Viscosity: The thickness of the oil (weight, like 5W-30 or 10W-40) affects pressure.
* Engine Wear: Higher mileage engines might have slightly lower pressure due to wear.
Your owner's manual will provide a *range* of acceptable oil pressure readings at various operating temperatures and RPMs. Consult your owner's manual for the specifications specific to your year and model LaSabre.
Generally, you should see oil pressure build quickly when you start the engine (cold), then settle to a reading within the specified range once the engine reaches operating temperature. While the exact numbers vary, most vehicles will show between 15-30 PSI at idle once warmed up and higher under load. A reading consistently below the minimum specified in your owner's manual indicates a problem that requires attention. Similarly, extremely high pressure might indicate a problem.
