I live off post and it's higher on post. I also don't use anything but cheveron.triston2469 said:I agree i have the 6i with an atx and i am lucky to get 300 in the city. on the highway i can get 400 no problem and that is doing between 75 & 80. I am glad to know that I am not the only one whose car is drinking gas. I fill up on post mostly, cause its always the cheapest.