im getting 11.5 mpg with 35's and 4 in lift, is that normal?
01-02-2013 | 08:36 PM
#1
Thread Starter
JK Enthusiast
Joined: Dec 2012
Posts: 102
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From: front royal va
im getting 11.5 mpg with 35's and 4 in lift, is that normal?
im putting it in the dealer for an exhaust leak at the manifold to y pipe. im hoping that the o2 is getting a lean reading from the leak and feeding to much fuel to make up for it. is this mpg normal or do i have something going on? ( i would just tighten it myself but warranty and the front drive shaft boot is cracked about 15 times so they will do that too at no charge) 4.10 gears, auto
01-02-2013 | 08:40 PM
#2
JK Jedi Master
Joined: Feb 2008
Posts: 12,882
Likes: 172
From: Maine
The exhaust leak probably has something to do with it.
Another thing to consider:
Did you reprogram your speedometer for the bigger tires? If not, you will register fewer miles for the amount of gas burned.
Another thing to consider:
Did you reprogram your speedometer for the bigger tires? If not, you will register fewer miles for the amount of gas burned.
01-02-2013 | 08:40 PM
#3
JK Jedi
Joined: Jun 2012
Posts: 5,255
Likes: 10
From: Bellmawr, NJ
I have a 2010 JKU Rubicon with a 4" Skyjacker lift and 315/70R17 Goodyear Duratrac tires and I get between low tens to low twelves depending on how much hiway driving but 11.5 is my average mpg on the dash too :-( I know it's off cuz of the tires tho cuz I'll drive 5miles and 15 miles will be gone on my distance to empty gauge on dash
01-03-2013 | 03:55 AM
#5
JK Super Freak
Joined: Apr 2007
Posts: 1,866
Likes: 3
From: Eastern Long Island, NY
1slowjeep - I've an auto and 4.10s with 35s. Used to get 10-11 mpg around town, then reprogrammed with a Procal and now get 12-14mpg plus a more comfortable drive given the better shift points and the lower engine rpm on highway. There are plenty of unused Procals for sale on this forum, mine was $100 shipped. Recommended !
01-03-2013 | 06:57 AM
#7
JK Super Freak
Joined: Oct 2012
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From: OCEAN SPRINGS, MS
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01-03-2013 | 07:03 AM
#8
JK Super Freak
Joined: Mar 2011
Posts: 1,934
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From: Seattle, WA
How are you getting that mileage? City or highway? How are you measuring it? Are you light on the accelerator or drive and accelerate fast? Any other mods on you Jeep?
My 07 Jeep is auto, and I use the Bully Dog tuner. The Jeep's computer usually estimates an optimistic value and the Bully Dog a lower value than the actual I get when filling the tank and calculating manually.
As for the actual values, I get between 12 and 14 in the city and around 19 on highways. If I use the 35in tire set the values are a bit lower than if I use the stock 32s.
My 07 Jeep is auto, and I use the Bully Dog tuner. The Jeep's computer usually estimates an optimistic value and the Bully Dog a lower value than the actual I get when filling the tank and calculating manually.
As for the actual values, I get between 12 and 14 in the city and around 19 on highways. If I use the 35in tire set the values are a bit lower than if I use the stock 32s.
