Looks like a blizzard is in the realm of $6? I don’t go to DQ, but living in a region with many of them I can say gas is generally accessible for ~$2.50 so unless you’re driving something that gets 10mpg there’s basically no way to make buying two be worth it. I only have to fill up gas once every month or two because my car is a plug in hybrid and I rarely go more than ~40 miles in a trip so it’s unlikely I use gas at all. With free nights I don’t even really pay much to fill my battery.

Gas is pretty cheap

Wouldn’t you be incapable of enjoying the sun