Americans are facing high gas prices this July 4 holiday weekend with the average cost at $3.82 per gallon. This is down from previous months but significantly higher than last year's holiday average. To ease the financial burden, Amazon Prime members can save 50 cents per gallon on one fuel purchase. This promotion is valid from Thursday, July 2nd, to Sunday, July 5th, for one fill-up. The savings could range from $5 to $15 depending on tank size. To qualify, users must have an Amazon Prime US subscription. Additionally, a free BP earnify account is required, with the Prime membership linked to it. The discount applies at over 7,500 participating gas stations. These include BP, Amoco, and select ampm and Thorntons locations. Users can access the discount by using the free earnify app at the pump or entering their phone number. Full details are available on Amazon's fuel savings page.