May 2, 2026

These 4 Poor Costco Habits End Up Costing You at the Gas Pump

Written by Vance Cariaga
|
Edited by Cory Dudak
Discover an outdoor shot of a Costco gasoline station is displayed with a line of cars on either side of the gas pumps

Costco is best known for letting you load up on groceries and other items at discounted prices. However, the chain has also earned a reputation for selling cheap gas, with members potentially saving a lot of money filling up there.

However, that's not always the case. There are instances when Costco gas might actually cost more than you would pay elsewhere. Here's a look at four such scenarios to avoid if you've gotten into the habit of filling up at Costco exclusively.

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Other stations selling at lower prices is the most obvious reason buying gas at Costco can cost you more money. It's also the most common reason. Although Costco might beat average gas prices in your area, chances are it doesn't have the lowest price.

If you drive several miles or more to get to the nearest Costco, then it doesn't make sense to go there just for the gas. You end up burning a lot of gas on the drive alone, which costs money. The best move is to buy gas at a nearby station and only get it at Costco when you are heading there anyway.

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Many gas companies and retailers offer rewards programs to customers to help them save money. If you belong to one of those programs, then buying gas at Costco might not be the best move.

For example, the Shell Fuel Rewards program lets you save 10 cents a gallon every time you fill up. With Exxon Mobil Rewards, you can earn at least 3 cents a gallon in points on gasoline and 2 cents in points on every dollar you spend on snacks, drinks, car washes and other items.

If you visit a Costco to fill your tank and then pop into the store afterward, you might end up spending $50 or more on things you don't even need. If you only need to buy gas and nothing else, resist the temptation to turn it into a trip that might involve impulse purchases.

This article was provided by MoneyLion.com for informational purposes only and should not be construed as financial, legal or tax advice.

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Written by
Vance Cariaga
Edited by
Cory Dudak