You may reduce your vehicle’s fuel consumption by:
- Correct answer: Driving calmly within the speed limit and making sure that the tire pressure is correct.
- Driving calmly within speed limit, using the lowest gear.
- Driving as slow as possible and reducing the vehicle’s excess weight.
- Driving as fast as possible and reducing the vehicle’s excess weight.
Why this is the answer
The correct answer in the official bank: Driving calmly within the speed limit and making sure that the tire pressure is correct.
Calm driving without sharp acceleration or braking, and staying within the speed limit, saves fuel, because air resistance rises sharply at high speed. Under-inflated tires increase rolling resistance and therefore fuel use. Using the lowest gear keeps engine revs high and wastes fuel, and driving as fast as possible is both wasteful and dangerous.