If you’re a Prime member, your weekly fill-up just got a little more interesting. Every Friday this spring, Amazon is basically paying you to top off your tank with a simple, stackable fuel discount that can shave real money off your monthly driving budget.

Here’s how it works: Prime members already get $0.10 off per gallon year-round at more than 7,500 bp, Amoco, and participating ampm and Thorntons locations across the U.S., thanks to a partnership that runs through bp’s earnify rewards program. From April 3 through May 29, Amazon is turning Fridays into “Fuel-up Fridays,” doubling that discount to $0.20 per gallon on one fuel purchase each Friday for eligible members. You activate it once, then it quietly does its thing in the background every time you pull up to a participating pump on a Friday.

The math is where this gets meaningful. Amazon points out that, based on typical U.S. driving habits, that everyday $0.10-per-gallon discount can add up to nearly $70 in annual savings for a Prime member who regularly buys fuel at qualifying stations. That’s almost half the cost of a yearly Prime membership, currently $139 if you pay annually in the U.S.. Factor in Fridays at $0.20 per gallon during the promo period, and regular drivers who time their fill-ups could squeeze out even more value. For a family that’s constantly shuttling to work, school, and weekend activities, that’s the kind of quiet savings that shows up over time, not just as a one-off deal.

Households can turn this into even more of a team sport. With Amazon Family, people living in the same household can share a broad range of Prime benefits, including this fuel offer, at no additional cost. During Fuel-up Fridays, two members in the same Amazon Family, each with their own earnify account, can do separate fuel transactions and effectively snag a combined $0.40 off per gallon across those two fill-ups. In practical terms, that might look like one partner filling up in the morning commute and the other topping off later in the day, both quietly stacking savings on the same shared membership.

The setup is pretty straightforward. Prime members head to amazon.com/fuelsavings to activate the offer, which links their Amazon account to a free earnify account from bp. Once that’s done, you use the earnify app’s store locator to find nearby bp, Amoco, or participating ampm and Thorntons stations. At the pump, you can redeem the discount just by entering the phone number tied to your account or by using a linked payment method; if you prefer, you can also start the pump and apply the offer directly through the earnify app by selecting the station and pump. After that one-time setup, you don’t have to fuss with codes or coupons every week—the discount just kicks in when you qualify.

This fuel deal slots into Amazon’s broader push to make Prime feel like an everything-membership rather than just a shipping pass. Alongside cheaper gas, members still get free delivery on more than 300 million items, including Same-Day and Next-Day options on tens of millions of products, with over 13 billion items delivered on the same or next day globally in 2025—a record pace. There are the usual perks like exclusive Prime Day-style deals throughout the year, streaming hits on Prime Video, ad-free listening on Amazon Music, grocery perks with Amazon Fresh and Whole Foods Market, and even discounted access to health services via One Medical and prescription savings through Amazon Pharmacy and RxPass. Amazon’s message is clear: if you’re paying for Prime anyway, they want you to feel that value in your daily life—when you’re watching a show, ordering paper towels, or now, just filling your tank on a Friday.

It’s also worth noting that Amazon has been layering in more targeted membership options aimed at younger people and households on tighter budgets, which may make this fuel offer more appealing to those groups. Eligible young adults and higher-education students can access a discounted version of Prime with a six-month trial period before paying a reduced monthly or annual fee, while qualifying government-assistance recipients can sign up for Prime Access at a lower monthly rate. For those members, the combination of cheaper fuel, delivery savings, and entertainment perks can punch well above the price of the subscription, especially if they’re willing to plan their gas runs for Fridays during the promo window.

For now, Fuel-up Fridays is time-limited: the $0.20-per-gallon Friday boost runs from April 3 through May 29, and it only applies to one fuel purchase per Friday per eligible member. Outside of that window, the standard $0.10-per-gallon benefit continues at participating stations, as long as your Prime membership is active and your earnify account stays linked. That means the smartest play if you’re a Prime member who drives regularly is to do two things: activate the fuel savings once, and then, whenever you can, schedule your bigger fill-ups on Fridays at a participating station. It’s not going to make gas free, but in a year where everything from groceries to streaming subscriptions feels a bit pricier, quietly knocking a few dollars off the pump every week isn’t a bad way to let your membership earn its keep.