The most important reason to do a pre-trip inspection is to ensure maximum fuel efficiency. Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question The most important reason to do a pre-trip inspection is to ensure maximum fuel efficiency. Answers True False Explanation The most important reason to inspect your vehicle before a trip is to ensure the safety of yourself and others on the road.