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10 Tips to Get the Most Out of a Tank of Gas

Consumer Reports experts show how to squeeze every mile from a gallon based on testing.

Jeff S. Bartlett, Consumer Reports Managing Editor, Autos.

By Jeff S. Bartlett
Managing Editor, Autos

Updated by Steven H. SaltzmanAdditional reporting by Jon Linkov

Updated March 18, 2026

A gas pump with a red handle inserted into a blue car

The nationwide average price for regular gasoline reached an all-time high of $5.02 per gallon on June 14, 2022. While the price has dropped significantly from that peak, it has climbed by 92 cents a gallon over the last month. And the current average of $3.84 a gallon (as of March 18, 2026) can still cost you a bundle if you log a lot of miles. The current national average price for midgrade fuel is $4.34; for premium, $4.71; and for diesel, $5.07.

Now is as good a time as ever to fine-tune your driving to maximize your fuel economy and ease the squeeze on your wallet.

Consumer Reports experts pulled together these proven tips to help you save money.

In this article

Expert Gas and Fuel-Economy Advice
When's the Best Time of Day to Buy Gas?
Talking Cars on Fuel Economy

Expert Gas and Fuel-Economy Advice

1. Stay at half a tank. Keep at least a half-tank of fuel during cold winter months and when there’s a risk of shortages, say, due to a lack of gasoline delivery drivers to meet travel demands or when a major storm or hurricane is imminent. This tip also applies to holiday road trips, when traffic can be congested and slow-moving. Having plenty of gas onboard can ease stress and give you more flexibility with when and where you fill up.

2. Check gas prices online. Apps and websites such as GasBuddy can show local gas prices, making it easy to find good prices in your area or when you travel. Generally speaking, gas stations well off major highways and away from city centers tend to have better prices, as do warehouse stores and some major travel centers.

3. Minimize travel to save gas. If you can delay errands or other activities, you’ll preserve the gas that you purchased and reduce overall consumption for the region, helping in some small way to reduce gas scarcity.

4. Obey speed limits for safety and efficiency. When you drive, follow the speed limits and drive smoothly. Your driving habits can play a significant role in fuel economy.

We measured gas mileage while driving at a steady 55, 65, and 75 mph in a Nissan Altima and Toyota RAV4. We found that reducing the speed from 65 mph to 55 mph improved fuel economy by 6 mpg in the Altima and 8 mpg in the RAV4. The penalty for cruising at 75 mph rather than 65 mph was almost 7 mpg in the Altima and 6 mpg in the RAV4. Higher speeds exact a toll on fuel consumption. Another way to look at it: Speeding up from 55 to 75 mph is like moving from a compact car to a large SUV. Beyond fuel concerns, speeding is, of course, a safety risk.

5. Drive smoothly. Avoid hard acceleration and braking whenever possible. In our tests, frequent bursts of acceleration and braking reduced an older Toyota Camry’s mileage by 2 to 3 mpg. Once up to speed, maintain a steady pace. The harder you accelerate, the more fuel you use. Unnecessary braking wastes the fuel you used to get up to speed. Drive smoothly and anticipate the movement of traffic. Smooth acceleration, cornering, and braking also extend the life of the engine, transmission, brakes, and tires.

6. Pay attention to aerodynamics. Remove roof racks when they’re not being used. At highway speeds, more than 50 percent of engine power goes to overcoming aerodynamic drag. Don’t add to that by carrying unneeded things on the roof. We did fuel-economy tests at highway speed in a Nissan Altima and Toyota RAV4 with a roof rack, tail-hitch rack, and rooftop box. Carrying two mountain bikes on the roof had the biggest impact. The Altima lost 13 mpg, going from 46 mpg to 33 mpg. The RAV4 lost 7 mpg, dropping to 32 mpg from 39 mpg.

There’s even a loss when driving with an empty roof rack. The Altima dropped 5 mpg and the Toyota lost 2 mpg. The Nissan lost 12 mpg with the bikes on the hitch-mounted rack, while the RAV4 was down only 5 mpg. The bikes protruded beyond the sides of the sedan, creating extra drag. They were mostly hidden behind the wider, boxier RAV4’s bodywork.

The rooftop box resulted in a 9 mpg decrease for the Altima and a 5 mpg drop for the RAV4.

Overall, aerodynamic drag didn’t hurt the more boxy RAV4 as much as it did the sleeker Altima.

7. Buy good-quality gas. We typically recommend using Top Tier gas—that is, gas that’s held to a higher standard through the voluntary participation of numerous gas station brands, including Chevron, Costco, Exxon, Mobil, and Shell. Beware that many familiar brands don’t have Top Tier gas. The goal is to feed your car good-quality gas whenever possible, but it’s fair to be flexible during a shortage or when traveling. If you use non-Top Tier gas on occasion, it may cause engine deposits. But the detergents in Top Tier gas can eventually clean any engine deposits that may accumulate.

8. Skip premium gas—if you can. Save money and skip premium gas unless it’s “required.” This is indicated on the fuel filler door. Many cars list “recommended,” which means it’s optional. If there’s only midgrade or premium fuel available, it will work fine in a car that’s rated for regular gasoline.

9. Check tire pressure. Monitoring tire pressure is important. Tires lose about 1 psi a month. Having tires with lower pressure than what’s recommended on your doorjamb sticker can affect performance, tire longevity, and fuel economy.

10. Skip the AC. Using air conditioning consumes gas. In mild weather, if you can get by without it—especially with open windows—you’ll see incremental savings. But once it gets hot, having AC on to cool the cabin and lower humidity is a wise investment in your comfort and ability to stay alert while driving.

When's the Best Time of Day to Buy Gas?

You may have heard that it’s better to buy gasoline first thing in the morning rather than in the heat of the day. That’s because mornings tend to be cooler, and like all liquids, gasoline expands when heated. It sounds logical—but is it true or just an urban legend?

We conducted our own tests and interviewed experts, and found that although the basic facts are correct, the advice is not.

Filling stations typically store their gasoline in underground tanks, where the temperature variation during the day is much less than in the air above. The result is that the temperature of the gasoline coming out of the fuel nozzle varies very little, if at all, during any 24-hour stretch at any particular gas station.

The Energy Marketers of America, a trade group that represents filling stations, says that “gasoline pumps dispense a full gallon irrespective of the temperature at the time."

Over a series of tests at different temperatures conducted at our Auto Test Center, we found that even with the temperature swings we observed in the first few gallons pumped at our facility, there wasn’t a significant penalty for consumers. A 15-degree difference, for example, would result in a 1 percent gain in volume. That’s just a few cents’ difference in the first gallons pumped—not enough to change your schedule or routine in chasing costs, especially if it might increase your fuel consumption in the pursuit.

Talking Cars on Fuel Economy

Jeff S. Bartlett, Consumer Reports Managing Editor, Autos.

Jeff S. Bartlett

Jeff S. Bartlett is the managing editor for the autos team at Consumer Reports. He has been with CR since 2005. Previously, Jeff served as the online editorial director of Motor Trend for 11 years. Throughout his career, Jeff has driven thousands of cars, many on racetracks around the globe. Follow him on X: @JeffSBartlett