Got Amazon Prime? You may be able to save at the pump.

Amazon Prime members can save an extra 25 cents per gallon on gasoline each Friday through the end of the year at thousands of fuel stations nationwide.

The promotion runs at approximately 7,500 participating BP, Amoco, and AM/PM locations nationwide. Prime members who link their Amazon accounts to BP’s Earnify loyalty program can access the weekly discount, which combines an existing 10-cent-per-gallon savings with an additional 15-cent Friday bonus.

Members can activate the discount at the pump by entering their phone number or scanning a code through the Earnify app. The savings apply to all fuel grades with no restrictions on the amount purchased. The offer can be used once each Friday.

To participate, Prime members must connect their Amazon account with BP’s Earnify platform, which involves sharing shopping data between the two companies.

The enhanced Friday discount will end after Dec. 26, but the standard 10-cent-per-gallon savings for Prime members will remain available through the Earnify partnership.