Question Without engine oil: Answers A vehicle will get better gas mileage. An engine can be destroyed quickly. An Anti-Lock Braking System (ABS) won’t work properly. Explanation It is critical that an engine have sufficient oil pressure. The engine can be destroyed rapidly if run without oil. This questions appears in the following tests: Maryland Class B Knowledge Test Minnesota Double Mississippi HazMat New Mexico Class B Knowledge Test Oklahoma Passenger Wyoming Class B Knowledge Test