Give them your BFC member number (found on your membership card) over the phone or in person to receive a discount. The discount you will receive depends on the product.
Give them your BFC member number (found on your membership card) when you order to receive a discount.
Bring your BFC membership card and Mastercard/Visa to the manager or attendant -- they will enter your credit card into their system to receive a fuel discount. Then every time you use that same credit card at the fuel pump you will get the discount.