Technician A says that oil pressure is normally higher when the engine is cold. Technician B says that normal engine oil pump pressure ranges from 20 to 80 psi (200 to 400 kPa) or 20 psi for every 1000 engine RPM. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because oil pressure is typically higher when the engine is cold due to the thicker viscosity of the oil at lower temperatures, which makes it harder for the oil pump to circulate the oil, thus increasing the pressure. Technician B's statement is incorrect; while normal oil pressure can range from 20 to 80 psi, the "20 psi for every 1000 engine RPM" is not a standard measure for oil pressure.

Technician a Says That Oil Pressure Is Normally Higher When