I’ve worked for companies that have gas stations in the past. I wasn’t directly involved in the setting of prices, but I was involved in the reporting of margins, and explaining the financial results to Wall Street (indirectly, I prepared “explainers” for our CEO & CFO). The company no longer exists (bought out by private equity who then franchise out the locations).
Retailers make higher margins during ex-refinery price drops and lower margins during price increases. We might have made 15 cents a gallon on average, and during times of less price volatility that’s what we’d make. Most of which goes in credit card and debit card fees, because you pay for the pre-authorization and the actual purchase separately on 80%+ of transactions (this was 20 years ago, it’s probably 90%+ now unless there’s a discount for cash). When wholesale prices dropped we’d make another 10 cents a gallon for a few days, then back to 15 cents. When prices rose, we’d get squeezed and effectively lose money after card fees. Again for a few days only. It was a rare event that moved margins by more than a penny or two a gallon for a whole quarter.
You can see the financial results for a handful of convenience store operators that are publicly listed. Most are either Private Equity owned, operate on a franchise model with mom-and-pop unit owners, or owned by giant global companies. So you can’t do that.
But I can assure you the lions share of profiteering from gasoline price volatility is taking place at the refinery and distribution level, not retail.
There are various pricing strategies at the retail level. All are very, very constrained by competition in most places. There are odd hyper local monopolistic cases, often created by local governments preventing competition, sometimes ostensibly for environmental reason, but sometimes because the very high priced station in the center of town is owned by a family that is popular enough and “generous” enough.
But on a main thoroughfare with ten gas stations in two miles, there are guys:
(a) Making 10 cents a gallon, paying it all over to the card processor, but making money off the soda, snacks and coffee side.
(b) Making 20 cents a gallon, paying 10 cents for card processing and doing a reasonable volume despite a 10 cent price disadvantage to operator on strategy (a)
(c) Making 40 cents, or even 50 or 60 cents a gallon but on 1/4 of the volume of strategy (b) by selling to people who just aren’t paying attention, are very brand loyal or are spending someone else’s money.
And of course there are differences between big brand and no-brand which adds further variations. But it’s mostly pretty competitive or extremely competitive. When costs go up all three strategies above are squeezed, when costs go down all make a little more for a few days.