12 Ways to Fill Up for Less at the Gas Station

Most drivers have heard they can get a little more mileage out of their gas tank by accelerating more slowly, coasting when they can, or laying off the air conditioning. But you don't have to change your driving habits or swelter in a hot car to maximize your dollar at the pump. Here are a dozen ways to pay less for gas as you hit the road.

Related: The Cheapest Gas Prices in Every State

Some grocery chains operate their own gas stations, enticing customers with reward programs that accumulate points toward fuel discounts. Use your Kroger Shopper's Card anytime you buy groceries and earn one point for each dollar spent, double points on gift card purchases, plus point bonuses for using the Kroger pharmacy and grocery delivery. Redeem points in blocks off 100 or more for savings of 10 cents to $1 per gallon on a single fill-up. Safeway has a similar program for members of its Just for U shopper's club. The only drawback: Unused points expire at the end of the month.

If you're loyal to a particular company, don't leave money on the table by bypassing its rewards program. BPme members earn 5 cents off each gallon for every $100 spent on fuel. Shell's Fuel Rewards program also offers discounts of 5 cents a gallon up to 20 gallons, and you can earn additional savings of 5 to 10 cents per gallon by using your Fuel Rewards card when shopping online, buying groceries, or eating out.

You aren't crazy: Gas at the station on the corner actually was a lot cheaper the other day. Prices fluctuate throughout the week. GasBuddy crunched the numbers using three years of price data and found that Sunday, Monday, and Tuesday are the best days. A related GasBuddy study suggests that it may be cheapest to fill up in on Monday morning, when demand is at its lowest for the week. 

Some people say filling up early in the morning, when it's cool, saves money because gas expands when it's heated. But Consumer Reports concluded that any savings would be minimal at best. Stations may be more likely to raise prices in rush-hour traffic, though.

Costco's gasoline prices are more than 20 cents per gallon cheaper than competitors, according to a 2019 study by CSP, a convenience store industry trade publication. That can add up to significant savings that can make Costco's $60 annual membership pay for itself.

Related: 11 Ways Costco Can Save You Money on Your Car

Your phone can make comparison shopping easy. GasBuddy is among the most popular apps for finding the lowest gas prices wherever you may be. The Balance also recommends Gas Guru and traffic-spotter app Waze, which can flag cheap gas.

There are an overwhelming number of reward credit cards available that offer anywhere from 2% to 5% off the per-gallon price of gasoline or accumulate points redeemable toward air travel, hotels, or cash back. But choose carefully and look for sign-on perks such as bonus points or a low interest rate.

Some gas stations offer a discount to customers who pay with cash. Why? They avoid the swipe fees charged by major credit-card companies and fatten their bottom line.

Some websites let you take surveys, watch videos, or shop with retail partners in exchange for points that can be used to earn gift cards. One of the most popular survey sites, Swagbucks, includes Exxon, Chevron, and Sunoco gift cards as rewards options.

You may think you're babying your car by buying the "good stuff," but premium gas offers little benefit for modern engines, according to Edmunds. Stick to premium if you drive a luxury car that requires it; otherwise, enjoy the savings of buying regular unleaded.

If you aren't using an app to check prices, experts offer this rule of thumb: Bypass stations immediately off the highway, which charge for convenience, and think twice about filling up in affluent areas where customers aren't as price-sensitive.

The biggest money saver may be simply remembering to hunt for deals. According to GasBuddy, when gas prices are low, there's actually more of a spread — not less — between the highest and lowest prices at the pump. Because of that, drivers who assume prices are low everywhere run a greater risk of overspending.