Study Reveals Cheapest Day to Fill Up in Illinois

Did you know that one weekend day is the best time to fill up your gas tank?

I didn't realize some days are better for getting gas than others.

READ MORE: Fuel Prices in Illinois and Where To Find Cheapest Gallon

Best Day of the Week to Get Gas and Save Money

GasBuddy says the middle of the week is the absolute worst time to get gas, especially Wednesday through Friday, but prices tend to drop by the weekend.

GasBuddy Says Midweek Is the Worst Time to Fill Up

That's why if you're looking to save a nickel and a dime, you might want to wait to get gas on Sunday.

Why Sunday Is the Cheapest Day to Buy Gas

If you do wait for the right time of the week to fill up, you can save up to 9 cents per gallon on average and as much as 45 cents per gallon in some states.

READ MORE: Illinois’ Gas Tax Is Going Up–Here’s How Much More It’ll Cost You

Those are states like Michigan, Indiana, and Ohio that see bigger price swings due to what is called "price cycling."

States Like Michigan, Indiana, and Ohio See Bigger Price Swings

That means, for example, if you save 45 cents per gallon by waiting for the best day, you could save $6.30 on a 14-gallon tank (14 gallons x $0.45) or about $10 on a 22-gallon tank (22 gallons x $0.45). Not bad, and it all comes down to which day you visit the gas station.

How Much You Can Save by Waiting to Fill Your Tank

I rarely notice changes in pump prices, maybe because I only fill up once a week. If you go more often, have you seen if Sundays are cheaper?