Some people say that a stretched timing chain could be the culprit, I've tried everything to get back up to my 21 mpg highway, timing chain is next there is quite a bit of slop in mine, can hear it slapping the cover lol.
97' Cherokee sport 2 DR / 4.0 Power Tech, 5 spd MAN, Command trac / Dana M30/181MM front axel, Corporate 8.25 rear axel / 6.5" Bastard lift, 31X10.5 Daytona futura's on Cragar 15X8 soft 8's, Logans Metals Front winch bumper, Flowmaster super 44, Magnoflow high flow cat
14-17 on 3:55s and 31s. It's gone down since I've put on my flowmaster super 44 though. Nothing wrong with the muffler, it just makes me want to floor the skinny pedal at every light
Not to mention my roofrack with my spare tire and hi lift on it acts like a mini sail on the highway
Just imagine a brick traveling at 70 mph with a mast and sail hanging of the top
The Jeep is a manly device. And a womanly device. An American device. It’s a fitting instrument to transport the free people of a free nation with the respect to which we are entitled and the dignity that we deserve. Okay, we’re a little crazy to have a Jeep for a daily driver. But if we go off our meds, we might wind up in a Prius
Go to Heaven for the climate, go to Hell for the company.
I thought that it didn't matter mpg if a wheel was steel or aluminum
The only way it would make a difference is the weight. But I wouldn't think it would make too much of a difference, especially when most of us are running 31"-35" tires.
Out if my 3 xjs my 2 aw4 autos I averaged 19-22 70/30 highway/city. My 5 speed averaged 20-24 same ratio. Those were when they were all stock. My xj now on 4.5" lift 33" tires and 3.55s gets between 12-14 50/50 highway/city. When I take road trips I can pull about 16-17. All this mileage is hand calculated and over about 35k miles. And the mpg with 33" tires is corrected by hand also. I'm a but for logging on all my cars.
Sounds like you're a bit off, or just use the skinny pedal a bit much. Most of your mpg is determined by your driving habits. Since you just did your tune up, maybe your o2 sensor like you said.
i get 12. All of the time, no matter where or what im doing, but i do have; a winch on a bumper with lights, and a roof rack with spare tire, spare tire on a rear tire carier, rock sliders, 31 inch tires, 3.5 inch lift, and stock gearing.