Hilldweller
SE Expedition Society
I used to get 21 as an average with my stock JK with the 3.8L, 32s, auto ----- 26 on the highway if I nursed it and 18 around town if I hammered.My jeep is the sport, so Im pretty sure it has 3.73. As far a MPG I havent finished a full tank yet, but the MPG computer says it getting 16.5. But when i fill up I will check it. Still alot better than the 11 or so I was getting in my XJ.
After the lift, 4.56s, 33s, bumpers, winch, that dropped to 16-20 or so.
With that new PentaJesus engine, you should do much better (I'd hope).
Use a gps to see if your odometer is true also. I had to correct mine.