How to Save on Gas
Most advice on how to save on gas focuses on finding a cheaper station. That helps, but when you run the numbers, it’s not where the biggest savings are. They come from three places: where you buy, how you pay and, above all, how you drive. Here are 12 ways that work, with real figures from the U.S. Department of Energy, and my take on which ones matter most.
By Nathan Brooks · Reviewed Oct. 15, 2026 · Mileage figures from FuelEconomy.gov (U.S. DOE/EPA)
Your savings plan
Tick what you could realistically do, not what you’d do in a perfect world. I’ll estimate what it’s worth in a year.
Default: this week’s U.S. average.
Estimates only. Percentages are applied one after another so savings aren’t double-counted. Station and rewards savings vary by area.
Where the real money is
Let’s use a typical driver: 12,000 miles a year in a car that gets 25 mpg. That’s 480 gallons, or about $2,080 a year at $4.33 a gallon. A 10¢-a-gallon discount saves about $48 of that. Now compare driving habits: if you tend to speed and brake hard, FuelEconomy.gov says smoother driving can improve mileage by 15% to 30% at highway speeds. Even 15% would be worth about $310 a year.
So my order of priorities is: drive smoothly and a bit slower first, use one free rewards program second, and pick cheaper stations and days third. The first one costs nothing and pays the most. — Nathan Brooks
Where you buy
1. Compare stations before you fill up
Prices at stations a mile apart can differ by 20¢ or more. Stations right next to highway exits and in busy tourist areas are often the most expensive. Use our gas stations near me map to see what’s around you, but only switch stations if the cheaper one is on your way.
2. Fill up on the cheaper day
In many states, prices are lowest early in the week. It’s a small saving, but it’s free once it becomes a habit. See the best day to buy gas and today’s rating.
3. Consider a warehouse club
Costco, Sam’s Club and BJ’s usually price below nearby stations, but you pay a yearly fee. It pays off if you buy enough gallons and pass the club regularly. Costco gas · Sam’s Club & BJ’s gas.
4. Fill up before crossing into a pricier state
Gas taxes differ by more than 60¢ a gallon between states. On a road trip, time your stops so you buy in the cheaper state. Compare gas prices by state.
How you pay
5. Join a free rewards program
Programs from grocery stores and gas brands take a few cents off each gallon, and grocery fuel points can be worth much more if you shop there anyway. Pick one and stick with it. Compare gas rewards programs.
6. Use a card that pays back on gas
Many credit cards give 3% to 5% back on gas. At $4.33 a gallon, 5% is about 22¢. That’s only a saving if you pay the balance in full; carrying a balance wipes it out many times over.
7. Ask about cash prices
Some stations charge less if you pay cash or with a debit card. The difference is usually posted on the pump or the price sign, so it’s worth a glance before you tap your card.
How you drive
8. Slow down on the highway
Gas mileage usually drops quickly above 50 mph. FuelEconomy.gov estimates that each 5 mph over 50 is like paying about 30¢ more per gallon. On a long highway drive, that’s the most expensive habit most of us have.
9. Drive smoothly
Speeding, hard acceleration and hard braking can lower gas mileage by roughly 15% to 30% at highway speeds and 10% to 40% in stop-and-go traffic. Leaving more space to the car ahead is the easiest way to brake less.
10. Don’t idle
Idling can burn a quarter to a half gallon of fuel per hour. Restarting a warm engine takes only about 10 seconds’ worth of fuel, so if you’ll be parked for more than that, turn it off.
11. Lose the extra weight and the roof box
An extra 100 pounds can cut mileage by about 1%. A large roof-top cargo box can cut it by 6% to 17% on the highway and 10% to 25% at 65–75 mph. A rear-mounted carrier costs much less.
12. Keep your car in shape
Correct tire pressure improves mileage by about 0.6% on average (up to 3%), and the right grade of motor oil by 1% to 2%. These are small on their own, but they’re also good for your tires and engine. Check your tires once a month, when they’re cold.
What doesn’t help
- Premium gas in a car that doesn’t need it. If your owner’s manual says regular, premium won’t improve mileage or performance.
- Fuel-saving gadgets. Be skeptical of devices and additives that promise big mileage gains.
- Driving across town for a small discount. A 10-mile detour can cost more in gas than you save on a fill-up.
Winter tip
Cold weather lowers gas mileage by about 10% to 20% in city driving and even more on short trips. Combine errands into one trip and skip long warm-ups: idling gets 0 miles per gallon.
Quick answers
What is the best way to save money on gas?
Combine a few habits: buy at the cheapest nearby station, use a rewards program and a gas credit card, and drive at moderate, steady speeds. Together they can cut your yearly gas bill by 10% to 20%.
Does driving slower really save gas?
Yes. FuelEconomy.gov says mileage usually drops quickly above 50 mph and estimates each extra 5 mph is like paying about 30¢ more per gallon.
Is it cheaper to fill up in the morning?
No. The idea that gas is denser in the cool morning doesn’t make a real difference, because fuel is stored underground at fairly steady temperatures. The day of the week and the station matter more.
Does running the AC use more gas?
Yes, especially in stop-and-go driving. At highway speeds, the AC is usually a better choice than open windows, which add drag.
Keep saving
Sources
FuelEconomy.gov: driving more efficiently · FuelEconomy.gov: keeping your car in shape · FuelEconomy.gov: fuel economy in cold weather · EIA Gasoline and Diesel Fuel Update
FuelPriceScout is an independent information site. We don’t sell fuel and we’re not affiliated with any gas station, retailer or rewards program mentioned here. Prices are averages from public sources and are not what a specific station charges; program terms can change, so always check the official site before you sign up. How we get our data.