That is what I said. They don't set the price. Outside sources do.
You touch on convenience store operations, which opens up a whole new set of issues. Pricing, promotions, staffing, training, optimal facility layout. Etc.
But this place doesn't do that.
It's very hard to make money in the gas retail business without convenience store operations. They will have to burden their gasoline with a much higher level of fixed costs.
The phrase you are looking for isn't "make money", but "make sustainable profit". As long as they don't need to make that 5 to 10 or whatever percent off the top, the sustainability of the operation is simpler.
And I imagine it will be challenging to acquire gasoline at a competitive price compared to those who have a sophisticated procurement organization and significant more scale and bulk purchasing power.
That is unlikely as municipalities usually have gasoline stations of their own for the Public Works operations. So they need to gas up lots of cars and trucks (the number varies by the size of the municipality).
Oh, and if your pricing policy is "slap a few cents onto whatever you paid for it" you're often going to find you are wildly out of the market on many occasions. And gasoline customer are quite price sensitive. It's hard to offset your largely fixed costs when you aren't selling any gasoline. Even harder without a store. On the other hand there will also be cases where your gas is so cheap you'll sell it out much faster than you anticipated and run dry. Customers don't like gas stations that run dry.
Yet all these problems have yet to surface. Though I do like you argument that even if it is successful, it is doomed to fail.
Here's what I suggest. On your drive home from work today, observe some gas stations. See if you can infer from your observations what things make a gas station successful.
I suggest you may observe the following: successful gas stations are in busy locations, they are well lit, they have easy access to multiple pumps, they have efficient high speed equipment, they have automated card readers, they have convenience stores(perhaps that have exclusive deals with Doritos, Krispy Kreme, Dominos, whatever), they have a brand of gasoline that consumers consider reliable, they may have a car wash, they are clean. They may have an affiliation/affinity program with another business like a Costco, or a Canadian Tire, or a grocery store that allows them to operate as something close to a loss leader.
Why do they have these things? Gasoline is largely a commodity. Customers highly value price and convenience when they buy it. The costs of operating a gas station are largely fixed. Employee costs, property costs, lighting costs, etc are largely the same whether people buy your gas or not. The cost of acquiring gasoline in a given area is relatively the same for everyone, with discounts and efficiencies largely related to the scale of volumes you purchase.
The way a gasoline franchise is successful is to
sell a lot of gallons at a very low margin and take advantage of the traffic this generates to cross-sell beer, snickers bars and lottery tickets.
This is not a big secret. Anyone with the slightest clue about gasoline retail will agree with it. Anyone who drives past gasoline stations can observe this is what they are doing.
Now, does this municipal fuel depot offer any of this? Will it have a conveniently located well lit station? Will it have easy access to multiple high speed pumps? Will it have automatic credit card readers at every pump? Will it have a c-store or affinity program? Will it have a reliable branded gasoline that customers trust? Will it have economies of scale in its fuel purchasing program?
I think the answers are no, no, no, no, no, no and uh, no.
Stations without these things are not profitable. Most of them were shut down decades ago because they were not profitable. This is why you don't see them. They do not make profit. The number of gas stations in the US has been declining for decades. It's a brutally competitive high volume, low margin business.
So the idea that you will be successful because you choose not to make a profit here is silly. You will not have that choice. You know this if you understand the retail gasoline business. Which they don't.