After a vehicle is started, the engine oil pressure should come up to normal: Question After a vehicle is started, the engine oil pressure should come up to normal: Answers Within seconds. Within five minutes. Within three minutes. After five minutes. Explanation After a vehicle's engine is started, the engine's oil pressure should rise to its normal level within seconds. Do not drive a vehicle with oil pressure that is too low. This questions appears in the following tests: Connecticut Passenger Massachusetts Double Oregon Class B Knowledge Test South Carolina Tank West Virginia Passenger Wyoming Class B Knowledge Test