Amazon Prime members can save a little extra the gas pump today, through an exclusive offer. The promotion, available to members only on Friday, Oct. 3 allows users to receive $1 off per gallon of gas at participating BP, Amoco and ampm gas stations nationwide.

To get the offer, Prime members with active accounts must download BP’s new earnify app and link their Prime account to the app. Once the accounts are linked, users will be able to get $1 off per gallon for up to 35 gallons of gas. The discount can only be used one time in the same transaction.

Related story: Amazon drops Prime benefit that’s been available for more than 15 years

The offer is available at more than 7,500 gas stations nationwide. Participating gas stations can be found in the earnify app.

Once the promotion concludes, Prime members will continue to receive 10 cents off per gallon when they link their Prime account to the app.

According to AAA, the national average price for a gallon of unleaded fuel as of Oct. 3 is $3.15.

For more information on the promotion, visit the Amazon Prime website.