I don't know if there are citations, but there is a very well known trend in the retail gas industry of 0% margin on the fuel, and 100% of the profit coming from the mini-store.
I have a friend who runs about a dozen gas stations in the bay area, and they literally change the price for each tanker of gas that comes in - the pricing is so dynamic - and they get charged based on the neighborhood/market that they are in. Her goal is to not lose any money on gas sales, and make it all up in the store.
I have a friend who runs about a dozen gas stations in the bay area, and they literally change the price for each tanker of gas that comes in - the pricing is so dynamic - and they get charged based on the neighborhood/market that they are in. Her goal is to not lose any money on gas sales, and make it all up in the store.