With gas prices constantly moving, most drivers assume the only way to save money is to hunt for the cheapest station in town. While shopping around certainly helps, new research from GasBuddy shows there's another simple trick that could save you money all year long: buy your gas on the right day of the week.
According to a new nationwide analysis by GasBuddy, the day you choose to fill up can make a measurable difference. After studying daily statewide gasoline prices over the past year, GasBuddy found that Sunday is the cheapest day to buy gas in most states. By contrast, prices are generally highest between Wednesday and Friday, with Thursday frequently emerging as the most expensive day.
The savings won't make you rich overnight, but they can add up over time. GasBuddy estimates that motorists who consistently fill up on the least expensive day instead of the most expensive day can save between four and nine cents per gallon. For a family with multiple vehicles, that's an easy way to shave a little money off the annual fuel budget without changing driving habits.
Why do prices fluctuate so much during the week? According to GasBuddy, gasoline prices don't simply respond to crude oil prices or world events. They also tend to follow predictable weekly patterns. In many parts of the country, retail prices gradually climb through the workweek before easing again over the weekend. That creates a recurring window when drivers who can plan ahead often pay less at the pump.
Patrick De Haan, GasBuddy's head of petroleum analysis, says many motorists don't realize gasoline follows a weekly rhythm in addition to reacting to global energy markets.
However, there are important exceptions depending on where you live.
GasBuddy points to several "price cycling" states where gas stations follow a much more dramatic pricing pattern. Texas is one of them, along with Michigan, Indiana, Ohio and Florida. In these states, retailers often raise prices sharply on one day before gradually lowering them over the next several days as competition returns. Drivers who buy immediately after one of these price spikes may pay substantially more than someone who waits a few days.
In fact, GasBuddy says drivers in price-cycling markets can sometimes save anywhere from 15 to 45 cents per gallon simply by avoiding the peak of the cycle. That's a much larger difference than the national average and makes timing even more important for motorists in those areas.
The study also reminds drivers that no single rule works perfectly every week. Gasoline prices still respond to refinery outages, seasonal demand, hurricanes, geopolitical events and fluctuations in crude oil prices. Those larger market forces can override normal weekly pricing patterns, especially during periods of supply disruption.
Timing isn't the only way to reduce your fuel bill, either.
GasBuddy recommends using price-comparison apps before filling up, since prices can vary significantly between stations located only a few miles apart. Drivers can also take advantage of grocery store fuel rewards, warehouse club discounts and credit card rebate programs where available. Keeping tires properly inflated, avoiding aggressive acceleration and combining errands into fewer trips can also reduce fuel consumption.
The bottom line is that while you can't control the price of oil, you can control when you stop for gas. If your schedule allows, making Sunday your regular fill-up day—and avoiding midweek whenever possible—could save you money with almost no extra effort. And if you live in Texas or another price-cycling state, paying attention to local price patterns may save even more.
Sometimes the easiest money to save is the money you never spend.
