Best Day to Buy Gas

The best day to buy gas is Sunday or Monday in most states, and Wednesday through Friday are usually the most expensive. That’s the short answer from GasBuddy’s 2026 day-of-week study. The more useful question is how much it’s actually worth to you, and whether there’s a bigger saving hiding somewhere else. Below I put numbers on both.

Based on GasBuddy’s 2026 day-of-week study · By Nathan Brooks · Reviewed Oct. 15, 2026

“Today” uses your device’s date. Day ratings are general patterns, not a guarantee for any single station.

How much can you save by picking the right day?

In most states, filling up on the cheapest day instead of the most expensive one saves about 4¢ to 9¢ a gallon. On a 15-gallon fill-up, that’s roughly 60¢ to $1.35 each time. If you fill up once a week, it works out to about $30 to $70 a year. Not life-changing, but it’s free money for a habit that costs you nothing.

In states where prices move in cycles, the difference is much bigger: 15¢ to 45¢ a gallon. That can mean $2 to $7 on a single tank. If you live in one of those states, timing is the single most valuable gas habit you can build.

States where gas prices move in cycles

In some states, stations raise prices sharply all at once, then let them slowly slide down for a week or two before the next jump. This is called price cycling, and once you’ve seen it, you can’t unsee it. GasBuddy has seen it most in:

• Michigan, Indiana and Ohio
• Florida
• Texas
• Parts of the West Coast

How I’d use it: if you live in one of these states and prices just jumped, wait a few days if your tank allows it. If prices have been falling for a week or more, fill up soon, before the next jump. Watching your usual stations for two or three weeks is usually enough to learn the rhythm.

Is timing worth the effort?

It depends on where you live. Outside the price-cycle states, the day of the week saves a few cents, and it works best as a tiebreaker rather than a plan. A free rewards program or a cheaper station on your route will often save as much or more. Inside the cycle states, timing beats almost everything else.

What I’d avoid is the opposite mistake: driving across town or waiting until you’re on fumes to catch a cheaper day. Keep the tank above a quarter, fill up when it’s convenient on a cheaper day, and stack a discount. That’s the routine that saves money without turning gas into a part-time job. — Nathan Brooks

5 timing habits that save money

1. Fill up at half a tank. You’ll never be forced to buy on an expensive day or at an expensive station. It’s the habit that makes all the others possible.
2. Make Sunday or Monday your routine day. A fixed habit beats checking prices every day.
3. Fill up before long weekends. Busy travel days can bring higher prices at stations along popular routes, and lines too.
4. Avoid highway exits when you can. Stations right off the highway often charge more than ones a mile or two away. Find stations near you.
5. Stack a rewards program. Picking the right day plus 5¢ to 10¢ off from a gas rewards program can double what timing alone saves.

Quick answers

What is the cheapest day to buy gas?

Sunday and Monday, according to GasBuddy’s 2026 study of daily prices across the U.S. Wednesday, Thursday and Friday were usually the most expensive days.

Is it cheaper to buy gas in the morning or at night?

There’s no reliable nationwide pattern by time of day, because each station sets its own prices. Checking prices before you go (for example on a map) matters more than the hour.

Does the best day work in every state?

It’s a general pattern, not a rule. In price-cycling states like Michigan or Ohio, where you are in the cycle matters more than the day of the week.

How much does the best day really save?

Usually 4¢ to 9¢ a gallon, or 15¢ to 45¢ in price-cycling states. It’s small per tank, but it adds up over a year, and it costs nothing.

Keep saving

Sources

GasBuddy: best day to buy gas 2026 · 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.