Myths about vehicle fuel savings

Many common fuel-saving tips are myths that waste money and do not improve your car's performance.

By Stephen Montgomery, Neighbor

Aug 31, 2026 5:05 PM CDT

This post was contributed by a community member.

Filling car with gas

1. Premium Fuel Improves Gas Mileage

Unless your car specifically requires premium gasoline, using it will not increase fuel efficiency or performance. Regular unleaded fuel is sufficient for most vehicles, and paying extra for premium is usually unnecessary.

2. Filling Up in the Morning Gives More Fuel

Gasoline is stored underground at gas stations, keeping it relatively cool throughout the day. Buying fuel in the morning does not provide more volume or better mileage.

3. Idling Saves Fuel

Modern engines warm up faster while driving. Extended idling wastes fuel and increases emissions. Start your car and drive gently for the first few minutes instead.

4. You Must Warm Up Your Car Every Morning

Older carbureted engines needed warm-up time, but modern fuel-injected engines do not. Driving gently after starting is sufficient to reach optimal operating temperature.

5. Premium Gasoline Protects All Engines

High-octane fuel only benefits engines designed for it. Using premium in a regular engine does not protect it or improve efficiency.

6. Driving on Empty Is Harmless

Running your car on very low fuel can damage the fuel pump and limit your options for refueling, potentially costing more if you stop at a more expensive station.

7. Overinflating Tires Saves Gas

Proper tire pressure improves fuel efficiency, but overinflating can reduce traction, cause uneven wear, and may not significantly save fuel.

8. Drafting Behind Large Trucks Saves Fuel

Tailgating to reduce wind resistance is dangerous and can increase fuel consumption due to frequent braking and acceleration

9. Fuel Additives Significantly Improve Mileage

Most modern fuels already contain detergents, and additives rarely provide noticeable benefits unless addressing specific engine issues.

Practical Tips

Focus on proven strategies: maintain proper tire pressure, drive smoothly, avoid unnecessary idling, and follow your manufacturer's fuel recommendations. These steps are more effective for saving fuel and protecting your vehicle than following common myths.