M jk is my 3rd jeep. Once you get above 33's, you will see a significant drop in gas mileage. Gotta start looking into more expensive lifts and lower gear ratios as well if you go taller than that. Also, all the extra ad ons to make the jk tick. It is addictive, kinda like tattoos...and you always start out with just something easy....like bigger tires. Have fun and good luck!