Why you should fill up on gas on Monday mornings (and never on Friday afternoons)
Want to save money at the pump? Fill up on Monday morning on your way to work.
That's the advice of GasBuddy, the fuel-savings app that tracks real-time data from more than 150,000 gas stations throughout the country.
In a study provided exclusively to USA TODAY, GasBuddy assessed the best day to fill up and the worst day to fill up nationwide and in each state.
While Monday is the best day on average nationwide to fill up, Friday is the worst day. (Scroll down to see state-by-state details on the best and worst time to get fuel.)
"Very early in the week, when gas stations are generally a little bit quieter traffic-wise, is a great time to fill up," said Patrick DeHaan, head of petroleum analysis for GasBuddy. "We generally see more volatility and higher prices later in the week."
On Mondays, some prices tick upward in the afternoon, so it's often a good idea to fill up in the morning. On Fridays, prices often spike in part because some stations are seeking to make more money ahead of weekend trips.
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The best day to buy gas, by state:
Monday: Alaska, Arizona, California, Colorado, Connecticut, District of Columbia, Florida, Idaho, Illinois, Indiana, Kentucky, Maine, Massachusetts, Michigan, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Dakota, Oregon, Rhode Island, South Carolina, South Dakota, Vermont, Virginia, Washington, West Virginia, Wyoming
Tuesday: Alabama, Arkansas, Delaware, Georgia, Iowa, Kansas, Louisiana, Maryland, Minnesota, Mississippi, Missouri, Nebraska, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Wisconsin
Wednesday: Hawaii
Sunday: Utah
Read more: https://www.freep.com/story/money/2019/04/09/gas-prices-gasbuddy-best-day-to-fill-up/3399198002/
= new reply since forum marked as read
It's not like I'm going to run out, but I'll have the time and I don't like to let it get too low - but after reading this, I guess I should wait since it's supposed to be the worst day in my state. 
I think it's 10-cents off a gallon there for every $100 you spend on groceries. And I also belong to GasBuddy which is mentioned in the article. I don't really expect to win a free gas card since it's open to everyone in the U.S. and Canada, LOL. But I keep track of local gas prices so I know the best places to get gas. You don't have to join, you can just check the prices in your area. 
https://www.gasbuddy.com/
Stations every morning when I go to the Y. If the price is low I get it before because I know it will be up before I go home!
The last time I filled my tank with 15 cents off I paid $1.96. Now it is $2.70.
It was $2.59 then - so I paid $2.29. Today it was up to $2.67 where I usually go. The only stipulation is that it has to be Sunoco - they're not the cheapest, but not the most expensive, either. That would be Mobil. 
A lot. This month I slowed down. Freezer full, canned goods full, pantry full.
I am now clearing out for the food drive, clothing drive. . Then I will work on the Boy Scouts Parking lot sale.
But swimming?? I learn something new on DU every day! 
But Trump wants to make E-15 available year round. And it's sure not "summer" here, we had more snow last Friday.
