17.9 mpg?
08-12-2011, 05:24 PM
#14
JK Freak
My JK gets between 14 and 16 mpg in heavy traffic... Lots of traffic lights... more sitting still than moving. However, on the highway I routinely get 22 mpg with the top down. I find that the hardtop gets a bit better mileage than the soft top, less parasite drag. If I lollygag along at 60 mph, I can get 24 mpg on flat highways. With the soft top on and up, I can manage only 23 mpg using cruise control. It was better, but the bigger tires and mods have cut into the fuel mileage. A big killer of fuel mileage is the stop and go caused by endless stop signs. Around here, we have a stop sign epidemic....
08-12-2011, 05:48 PM
#15
JK Enthusiast
Join Date: Nov 2010
Location: Luling,La.
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My JK gets between 14 and 16 mpg in heavy traffic... Lots of traffic lights... more sitting still than moving. However, on the highway I routinely get 22 mpg with the top down. I find that the hardtop gets a bit better mileage than the soft top, less parasite drag. If I lollygag along at 60 mph, I can get 24 mpg on flat highways. With the soft top on and up, I can manage only 23 mpg using cruise control. It was better, but the bigger tires and mods have cut into the fuel mileage. A big killer of fuel mileage is the stop and go caused by endless stop signs. Around here, we have a stop sign epidemic....
08-12-2011, 10:58 PM
#17
JK Super Freak
To put it into perspective, at 70MPH in 6th gear the motor is only turning over 1950RPM with the 3.21s & 32" tyres, vs over 2500RPM with the Rubi's 4.10s. At 40MPH in 5th (which is the 1.1 ratio for the 6-speed box & eqiv to 3rd in the autos) she's barely turning over 1100RPM.
Last edited by JKlad; 08-13-2011 at 07:55 AM.
08-13-2011, 07:23 AM
#18
JK Newbie
Join Date: Jun 2009
Location: Alabama
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wow I get b/w 17-21 depending on my road rage; of course no lift, but I do run 32" Bridgestone Dueler a/t 695's and I have two o2 sensors that are shot lol (working on fixing that though)
08-13-2011, 04:20 PM
#19
JK Freak
Typically, 24 mpg is under ideal conditions. I have the auto with 3.73 gears. The overdrive (a very tall final drive ratio, something around .6/1) is what provides for the exceptional mileage. However, when I get into the hills, the overdrive cannot maintain speed, and it unlocks. Net result is a 2 to 3 mpg decrease in mileage. Driving mountain highways, I'm happy to get 19 to 20 mpg. Another factor to consider is that my JK is a two door, several hundred pounds lighter than the JKU.
