So around my parts of southeastern Wisconsin gas is down to around 2.99 a gallon. Sure beats the hell out of 4.03 I was seeing this summer. But the question is how much is a good amount to have at all times? If you figure gas only last for a 12-16 months before it starts going bad. So if you have a gallons of the stuff laying around in a shtf senario how much would you use and would it last you before its only good for is starting fires.