In my rural county the cops, school busses and basically all the public service vehicles like ambulances and plows fill up at the farmer’s coop, where farmers get cheap gas for their tractors. I have heard that this is not technically legal, because that has is specifically for tractors and has some kind of special price because of that, but I don’t know if that’s true or not. I know you’re not allowed to fill up your regular car there, but some of the farmer’s and cops do.