When it comes to saving on fuel, timing matters more than most people think. While prices at the pump are influenced by everything from oil markets to weather, data shows that the day of the week you fill up can significantly affect how much you pay per gallon.

Here’s why Tuesday and Wednesday are typically the best days to buy gas, why weekends tend to cost more, and how to create a fueling routine that keeps more money in your tank over time.

Tuesday and Wednesday: The Sweet Spot for Savings

Multiple studies, including those from GasBuddy and AAA, show that Tuesday and Wednesday mornings are consistently the cheapest times to buy gas in most U.S. markets. Prices often dip midweek as stations adjust rates based on early-week trends and competitor pricing.

Why it works:

• Stations are more likely to drop prices early in the week to remain competitive.
• Demand is generally lower on weekdays compared to the weekend.
• Many stations reset pricing cycles on Monday night or early Tuesday.

If you can, aim to fill up before noon on Tuesday or Wednesday to get in ahead of price shifts or supply adjustments.

Why Weekend Prices Tend to Be Higher

Gas prices tend to spike on Fridays through Sundays, and it’s not just coincidence.

Here’s what drives the weekend hike:

• Higher demand: More people are hitting the road for errands, travel, or leisure.
• Less competition: Fewer price adjustments occur over the weekend, meaning prices are often higher and more static.
• Preemptive hikes: Some stations raise prices in anticipation of weekend traffic.

Filling up late in the week could cost you anywhere from 5 to 15 cents more per gallon—depending on location, local demand, and nearby events or holidays.

Build a Fill-Up Routine That Works

To take advantage of weekly gas price trends, consider building a consistent fueling routine into your calendar. Some tips:

• Track your weekly mileage and aim to fill up on the same day each week—ideally Tuesday or Wednesday.
• Set reminders to fill up in the morning when prices are more likely to be stable.
• Don’t wait until empty. If your tank is low over the weekend, topping off early in the week can help avoid paying a premium.

This kind of routine is especially helpful for commuters, rideshare drivers, and families managing multiple vehicles. Over time, these small habits can add up to real savings without changing how or where you drive.