This is a bit off topic, but important to this discussion. My avocation is finding the best deals on just about everything. There is only one credit card in the country that provides unlimited 5% discounts on every fuel purchase (up to 75 gallons per transaction). Other cards limit the total rebate to a certain amount annually. It is a small business card, so you are supposed to have some type of sideline business in order to qualify, but the card is called an American Express Business "Simply Cash" card. When you try to describe this card by calling an agent at the main American Express phone number, most of them deny this card exists. Call only this American Express number, 800-521-6121 to apply. There is no charge for the card. At 5%, that's a 15 cent discount for every gallon at $3/gallon, all year long. Adds up.
Ron Gaus, asmartcar.com