Which driving behavior is recommended to maximize fuel efficiency?

• A. Drive as slow as possible
• B. The slowest speed of your highest gear (around 45-50 mph)
• C. Always drive in the lowest gear
• D. Maintain maximum throttle

Answer: (B)

Maximize fuel efficiency comes from keeping the engine in its least taxed range while minimizing air resistance. The best approach is to cruise at a steady, moderate speed in a high gear so the engine runs at a low RPM and with a light throttle. Around 45–50 mph is a practical range where you can stay in the top gear without overworking the engine, which helps conserve fuel.

Driving as slow as possible isn’t the most efficient because it can lead to more time spent at idle or with unnecessary acceleration and deceleration, which wastes fuel. Always driving in the lowest gear keeps the engine revving high, increasing fuel use. Maintaining maximum throttle is simply burning more fuel for the same progress. So, cruising smoothly at a moderate speed in the appropriate higher gear makes the engine work less and uses less fuel overall.