Currently the lowest gas prices on Disney property are $2.20 a gallon. Yes the weather is cooler and actually driving with the windows up and the air on should improve your mileage while traveling on highways because open windows increase resistince (wind). I find my mileage figures jump up a little when I travel and use the air as oppposed to having the windows open. For piddling around town I usually have the windows open.
Yeah, I remember the good ol' days of an Exxon "premium" of about 30 cents. Even some of the gas stations outlining the property on 535 are through the roof. I appreciate the efforts of Hess to keep prices "normal" and not inflate it to take advantage of folks. I love Hess, too, because they have Coke Icees!
Sometimes you feel gouged as it is, don't add insult to injury when your rental car needs a drink, too!