When starting a vehicle, the oil pressure should: Question When starting a vehicle, the oil pressure should: Answers Slowly build up pressure over a few minutes. Come up to a normal level within a few seconds. Start high, then decrease quickly while the engine runs. Explanation After starting a vehicle's engine, the oil pressure should come up to a normal level within seconds. Do not operate a vehicle if it has oil pressure that is low, dropping, or fluctuating. This questions appears in the following tests: Arkansas Double Connecticut Passenger Illinois Class B Knowledge Test New Jersey Class A Knowledge Test New Jersey Class B Knowledge Test West Virginia Class B Knowledge Test