Gas Mileage
JK Super Freak
Joined: Mar 2011
Posts: 1,934
Likes: 2
From: Seattle, WA
Besides only going downhill, make sure you have tail winds or even going downhill you will get poor mileage. ;-)
It's a very poorly designed engine and already on its limits even on a stock Jeep. The more I use it, the more it confirms several complaints I read everywhere. Chrysler should do their customers a favor and only use Honda or Toyota engines. Those two know how to design and build them.
It's a very poorly designed engine and already on its limits even on a stock Jeep. The more I use it, the more it confirms several complaints I read everywhere. Chrysler should do their customers a favor and only use Honda or Toyota engines. Those two know how to design and build them.
JK Freak
Joined: Aug 2011
Posts: 656
Likes: 0
From: Cheyenne Wyoming
I need some help and it was kind of addressed in this thread.
I understand Jeeps don't get the best gas mileage but I think I should be doing better than 12mpg city? I see some guys are getting high teens?
I am running 33inch tires on a 4 inch lift with stock gears, is there anything that will help my gas mileage? do I need to look for any problems?
I have heard turning the over drive button off will help.
Any serious sugestions?
I understand Jeeps don't get the best gas mileage but I think I should be doing better than 12mpg city? I see some guys are getting high teens?
I am running 33inch tires on a 4 inch lift with stock gears, is there anything that will help my gas mileage? do I need to look for any problems?
I have heard turning the over drive button off will help.
Any serious sugestions?
JK Super Freak
Joined: Jan 2010
Posts: 1,467
Likes: 0
From: Torrington CT
Originally Posted by Slob
I need some help and it was kind of addressed in this thread.
I understand Jeeps don't get the best gas mileage but I think I should be doing better than 12mpg city? I see some guys are getting high teens?
I am running 33inch tires on a 4 inch lift with stock gears, is there anything that will help my gas mileage? do I need to look for any problems?
I have heard turning the over drive button off will help.
Any serious sugestions?
I understand Jeeps don't get the best gas mileage but I think I should be doing better than 12mpg city? I see some guys are getting high teens?
I am running 33inch tires on a 4 inch lift with stock gears, is there anything that will help my gas mileage? do I need to look for any problems?
I have heard turning the over drive button off will help.
Any serious sugestions?
JK Freak
Joined: Aug 2010
Posts: 722
Likes: 0
From: Miami, Fl
my rubi started with terrible milage for about 4k miles then it bumped up. then i did allmy mods and it dropped slightly. I have 34" tires alot of armor and hundreds of punds of tools and get just under 16mpg.
last week i took out all of the tools got my exhaust chopped and a magnaflow straight muffler put in and I was getting 18mpg. do not know if it was the weight or the exhaust. I am sure it was a little of both, but the exhaust mostly!!
BTW I have seen so many people doing cat back systems from the internet or where ever for 4-$500.00. I was able to get mine done at a local shop including the magnaflow for $120.00. my exhaust runs just past the evap and then dumps down short of the rear axle. no bends in pipe from the y back! Also that stock muffler is huge and weighs prob. 40lbs. now that area is open for future mods.
hope that helps!
last week i took out all of the tools got my exhaust chopped and a magnaflow straight muffler put in and I was getting 18mpg. do not know if it was the weight or the exhaust. I am sure it was a little of both, but the exhaust mostly!!
BTW I have seen so many people doing cat back systems from the internet or where ever for 4-$500.00. I was able to get mine done at a local shop including the magnaflow for $120.00. my exhaust runs just past the evap and then dumps down short of the rear axle. no bends in pipe from the y back! Also that stock muffler is huge and weighs prob. 40lbs. now that area is open for future mods.
hope that helps!
Last edited by Tuto; Nov 18, 2011 at 06:30 AM.
JK Junkie
Joined: Nov 2011
Posts: 3,863
Likes: 1
From: Bossier City, LA
Regearing to 4.88 will put you pretty much back to stock power but going to 5.13 will set you up nicely if you want to upgrade to 35s later. Also try a hypertech or superchips tuner. Cai will help also and throttle body spacer
