I didn't want to post mine because I thought I was doing the math wrong and it seemed too good to be true, also, I haven't driven it enough and constantly to get an accurate reading. My math was telling me I was getting 17mpg before and jumped to 22 after. I drove it like I stole it for the first 2 weeks after I got mine and retuned but haven't smashed the skinny that much since. So, based on what JK is getting and what I calculated, it must be about right then.. I did get 400+ miles per tank when I went to California 2 weeks ago and I did hit the gas hard a few times when the damn semi's cut me off and slowed me down.. Mine has the 4.8 so I don't know if it would make much of a difference..