(CNN) — Prime members can now add “fuel discounts” to their ever-growing list of benefits. The newest perk from e-commerce giant Amazon will allow members to save 10 cents per gallon at the gas pump (up to an average of nearly $70 a year) at around 7,000 participating BP, Amoco, and AM/PM stations across the US. Members can avail themselves of the discount by linking their Amazon account to Earnify, a loyalty program app by BP. Data from GasBuddy shows that gas prices are at their lowest since January, but with global oil prices spiking due to ongoing conflict in the Middle East, worries about…