AA Smartfuel discounts are redeemable up to a maximum 50 litres on a single purchase of qualifying fuel product at participating BP and Caltex locations. Discounts cannot be redeemed in conjunction with any other fuel discount promotion or fuel card. Discounts expire at the end of the calendar month following the month in which awarded. Following each redemption, your AA Smartfuel account balance is reset to zero and no discount is carried forward.