There’s actually a really good explanation for this.
This is a mixing pump. It mixes ethanol into the fuel. Because the mixing happens before the part of the pump that measures how much is being dispensed, you need at least a few gallons to fully flush things out and get somewhere close to what you’re actually buying.
Nobody is going to come arrest you if you buy 2 gallons of gas. But the gas you get me not be the mix you wanted.
Fucking 15% ethanol now? So they basically just raised the price of gasoline 5%, and reduced the fuel efficiency of everyone’s vehicle, without so much as a peep. Where is this?
E15 is a different blend of fuel, it’s not at all gas pumps and regular 87/89/91 octane level fuel is still available (because not all cars can use E15 like the sticker says). Sheetz stations sell it in my area around Raleigh, NC.