Hey Guys,

New to the forums and to jeeps and I have a quick question. So the dealership takes deliver of my 4 door next week, and I ordered a package through them to have them install the mopar 4" lift, XD Hoss wheels and tires (20"), 36.5" nitto grapler tires, and a couple other cosmetic things. My question is (i tried searching and got mixed reports) how much of the 15-19MPG am I going to lose with the lift and wheels? I want to have a concrete Idea so that I'm not in shock when I calculate my first tank of mialage. Thanks for the info guys!

(Sidebar) I got the upgrated audio system with DVD capable 6 disc changer, and I was wondering if any of you installed a TV in the vehicle anywhere and what set up you went with.

Ty

 

Might as well have them swap the gears at the same time. If not, you may be sub-10 mpg. If you have an auto, I recommend 5.38, manual 4.88-5.13. Also by having them swap the gears, even though you're voiding the Chrysler warranty on the axles, you'll have their warranty for a year (or should).

With proper gearing, you'll probably be in the 11-13 mpg range around town.

 

God that's so much worse than I was expecting haha, I was thinking it would drop it to like 15-16 highway, 12-13 around town...damn

 

so would it be worth it for me to go with something smaller than the 20's?, maybe 18's??

 

Yes. Less rotating resistance on the axle (rubber weighs less than aluminum) and much better looks. 20s are pretty big for a Jeep and risk looking Hummeresque.

 

well, fewer tires choices for 18's. personally i would run 15" alloy wheels with tires and you'll have a difference in weight to help with your loss of mpgs.

get a superchips flashpaq, cai, muffler, and regear to 513's if you have an auto unlimited...

 

You won't be happy unless you can let go of the concern for mpg's.

 

It's not so much the size of the wheel that makes the big difference as it is the size of the tire and also, the width of the tire. Going to a 36.5" from say a 31" - 32" tire adds quite a bit more weight to the vehicle and the wider the tire is, the more friction that's generated on the road which will cause a drop in fuel economy. I don't think you'll see much of a difference going to a 18" Wheel instead of a 20" as you would from probably going from a 36.5" tire to say a 33" tire. Also, adding a lift changes the stock geometry adding to the wind resistance that already exists on the Wranglers.

You can do a few things to help the fuel efficiency some - the type of fuel you put in, driving habits, tire inflation, etc. With my 4" RC lift and Hankook 35s on 16" Steel Wheels, I average consistently around 15 - 16mpg average (with a 50%-50% mix of City/Highway) and around 17-18mpg average on the highway, driving at 60 - 65mph.

 

TIP:

When everyone else say's that they get 15 mpg to 18 mpg with 35's+ 4"+ Armor+, don't plan on getting that...

To many variables involved in calculating mpgs.

 

Thank you very much for the info I really appreciate it, thats the kind of detail I was looking for.