Originally Posted by DJ-of-E

I've use to work for an accounting firm that did taxes for these gas station owners. Depending on the franchise, gas station owners actually get reaped of much profit since a lot of them are using LIFO accounting rules to calculate taxes for their business.

It's pretty sad that they make more money off the car washing and vacuum pumps by cost/profit ratio than gasoline...and they make literally pennies when gas prices go up, hence some cost 10 cents per gallon more than others due to rent costs.