When it comes to filling your tank, timing can make a surprising difference. Fuel prices are not random—they follow weekly trends that, when used to your advantage, can keep more money in your wallet. If you’ve ever wondered whether Monday or Friday is better for a fill-up, this guide will help you understand gas price patterns and save money on gas every week.

Early Week Advantage: Monday and Tuesday

According to industry experts and consumer studies, the beginning of the week tends to be the sweet spot for lower fuel prices. Many stations adjust prices upward later in the week as demand increases, especially approaching weekends. By topping off your tank on Monday or Tuesday, you can typically get gas at a discount compared to waiting until Friday.

GasBuddy’s research consistently shows that Monday offers the lowest average prices nationwide. Combine this timing with Fluz to earn cashback on fuel instantly by buying a gift card before you pull up to the pump.

Midweek Creep: Wednesday and Thursday

Midweek prices can vary. Some stations start inching prices higher around Wednesday in anticipation of weekend travel. However, if you missed the early-week window, Thursday mornings might still offer a reasonable price before peak hours. Use this time strategically and always check for fuel cashback options to soften the cost.

Weekend Surge: Friday to Sunday

Fridays are notorious for price hikes, especially in urban areas and commuter-heavy regions. Increased demand from weekend travelers often pushes prices to their weekly peak. If you’re traveling over the weekend, try to fill up earlier in the week. And don’t forget, even during higher-priced days, you can earn cashback on fuel purchases through Fluz and make the most of every mile.

Bonus Tip: Watch for Local Trends

While national patterns are useful, local factors like regional supply, competition, and events can influence prices too. Keep an eye on neighborhood stations and loyalty programs. And no matter where you fill up, stack your savings by using Fluz to save money on gas or explore apps like Ibotta for maintenance rebates.