A new GasBuddy survey tracks the best and worst days to get gas to save money and time.

Gas prices seem to fluctuate each week without warning. Fuel prices are up 50 cents since the beginning of the year, and spike even higher during peak travel times, such as Memorial Day and summer vacations.

But you can fight back by filling up your tank on the right day, according to a new survey by GasBuddy.


The fuel-savings app tracked prices in 30 cities from January through March to find the best and worst days of the week to buy gas. GasBuddy lists real-time fuel prices at more than 150,000 gas stations and convenience stores.

Gas prices in Florida averaged $2.71 per gallon the week of April 8, according to AAA. The national average was $2.74.

Friday was the worst day to fill the tank, the study found. The peak time when gas stations are busiest: 5 p.m. Friday. Saturday and Sunday weren't much better.

Save the most by filling up from 7 to 10 a.m. on Mondays and Tuesdays, the survey said. Wait times are the best then, too.

The truth about gasoline: Does the brand you buy really make a difference?

With South Florida life so wrapped around commuting, we spend a lot of time in our cars and use a lot of gasoline. Plus, gas in South Florida is more expensive on average than in any other part of the state, so many of us choose the cheapest we can find. We asked experts the best approach.

Wednesdays and Thursdays were good days to top off the tank, but not the best.

"While filling up on a Sunday can save time, it doesn’t save money," says Patrick DeHaan, head of petroleum analysis at GasBuddy. "Our data shows that filling up on a Monday morning each week can collectively save drivers $2.1 billion and avoid the possibility of playing bumper cars at the pumps."

Monday also was the best day to buy gas in the last two years, previous GasBuddy studies found.