(WJW) - Amazon Prime is offering members the chance to save some money while filling up the tank this week.

On Oct. 3 only, Prime members in the U.S. can save $1 per gallon of gas at roughly 7,500 participating BP, Amoco and ampm gas stations, according to the company's website.

The deal is available to Prime members who have an Earnify (BP's new fueling app) account linked to their Amazon account.

Company officials said an Earnify account is free to create and "automatically applies 5¢ savings as a baseline offer, 5¢ savings for Prime members and an additional 90¢ savings during the promotional period to total $1 off per gallon during this promotional period."

Once your accounts are linked, just enter your phone number or use the Earnify app at a participating gas station.

The Oct. 3

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