What is normal oil pressure in a commercial vehicle?

Normal oil pressure in a commercial vehicle can vary depending on the specific make, model, and engine size of the vehicle. However, a good rule of thumb is that normal oil pressure should generally be between 40 and 60 pounds per square inch (psi) at idle, and between 70 and 90 psi while the vehicle is in operation.

It's important to check the vehicle's owner's manual for the specific recommended oil pressure range, as this may vary based on the specific vehicle model and engine. Low oil pressure can indicate a problem with the oil pump or oil passages, while high oil pressure can indicate excessive pressure in the oil system, which can put unnecessary strain on the engine components.