Save $10 a Tank: The One Day Each State's Gas Gets Cheapest
Revised after bias review
When to pump in your state
Sunday is the cheapest day to fill up in most states. But pricing patterns vary by region, and some states see their lowest prices on other days.
The difference between the cheapest and most expensive day of the week varies by location. On a 15-gallon fill-up, the average savings across states is about $2.70, based on recent price data.
Gas prices move daily based on crude oil costs, refinery capacity, local demand, transportation costs, taxes, and retailer margins. Retailers adjust prices throughout the week. Understanding when those adjustments happen in your state lets you time fill-ups to catch the lowest prices.
Why Sunday works for most drivers
Sunday is the cheapest day in most states. Analysts attribute this to lower wholesale costs late in the week and reduced weekday commuting demand.
The pattern holds consistently across large regions. Competitive pricing pressure may influence Sunday prices, though actual mechanisms vary by market and region.
The exceptions that matter
Not every state follows the Sunday rule. Drivers in Utah, Nevada, and most of the northern Rockies see Monday lows. Parts of the Gulf Coast hit bottom on Tuesday.
Checking your state's specific cheapest day takes seconds online or through gas price tracking apps. These tools show real-time prices and historical patterns for your area, letting you plan fill-ups around the actual lowest prices in your region.
How to use this to save money
Fill up on your state's cheapest day whenever possible. If you drive 12,000 miles a year and get 25 miles per gallon, that's about 32 fill-ups annually, assuming a 15-gallon tank. Saving the average 18-cent spread on every fill-up would trim about $86 a year for a typical driver.
Plan errands and trips around gas prices when you can. Set phone alerts for price drops in your area. Share the cheapest day with friends and family in your state, since they face the same local pricing patterns you do.