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Unread 10-19-2011, 04:38 AM   #1
SJMUDWRANGLER
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fuel mileage on jk with 35's vs 33's

I have a 2011 jk auto, with the stock sneakers.I'm averaging 18.5 mpg's at 70mph for my 50miles a day ride to work. I'm tossing the idea of 33's or 35's on a 17x9 mt sidebiter. Just trying to get some input on what mpg everyone is getting on 33's and 35's.

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Unread 10-19-2011, 06:02 AM   #2
flhrc0745
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It all depends on whether you are going to Lift it and if u are expect to lose any where from 3-5 miles to the gallon. Even if you re-gear which u will need to do if you put 35's on this I know because I had to and I am getting around 14-15 on the highway and thats with the wind behind me . Remember u are driving a 4 wheel drive Vech. If you wanna keep the MPG u are getting now keep what u got.
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Unread 10-19-2011, 06:49 AM   #3
Jeeprin
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Quote:
Originally Posted by flhrc0745 View Post
It all depends on whether you are going to Lift it and if u are expect to lose any where from 3-5 miles to the gallon. Even if you re-gear which u will need to do if you put 35's on this I know because I had to and I am getting around 14-15 on the highway and thats with the wind behind me . Remember u are driving a 4 wheel drive Vech. If you wanna keep the MPG u are getting now keep what u got.
Agreed, put it this way...when mine was stock I was getting close to 360 miles to the tank. I then switched to 33's and that number dropped to 350...no too bad. Once I went to 315/75/16's, 3" lift, bumper-winch, 5.13 gears that number floats around 260 miles a tank. If it really baby it I can squeeze out 278-280. Expect a big change!
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Unread 10-19-2011, 08:11 AM   #4
jstrubberg
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What gearing do you have?

My rig is creeping up on 17mpg average with 35s and a 3 inch lift.
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Unread 10-19-2011, 09:39 AM   #5
WXman
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Mine consistently put up 19 MPGs in my mixed city/highway routine when it was bone stock. I was VERY happy with the mileage I was getting, all things considered. (225/75-16s on steel wheels).

Put 31s on it and that went to 17.5 MPGs.

Put a small 3/4" lift on, and new alloy wheels (5 lbs. lighter than the stock wheels), and 33" tires... and now I'm driving it easy to pull 16 MPGs.

In terms of cash, you're talking $50 per month at current fuel prices just to ride on 33" tires. Is it worth it? I don't know. I love my setup...it's a good mix for me. But it sure does hurt at the fuel pump, especially when you've got kids to take care of and other places to spend money. Running big tires and negative offset wheels looks great, but it's not just a one-time investment. It costs you money every time you turn the key. Just food for thought..
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Unread 10-19-2011, 10:36 AM   #6
Murder1
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I'm getting anywhere from 15-16 being real easy with it in town thats after I regeared & I calibrated the speedo last night. I don't know about highway yet but before the regear & everything I was getting at most 14.3. Im running 35's with a 4 inch lift. I also have a banks air ram intake which helps out little I was about 1.5 mpg worse before installing the intake.
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Unread 10-19-2011, 04:17 PM   #7
jrmandryck
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I have a 2008 JK 2 door, automatic with a tuner, 2" BB and 33's I get around 19-20ish
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Unread 10-19-2011, 06:26 PM   #8
LVCapo
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2007 JK 2D, 285/70/17 (32.75") on stock rims, auto, 4:10s, 2" OME lift, Superchipped.....average 18.5-19MPG mixed driving. to me the key is keeping it around 65MPH and not jumping on the gas leaving stops.
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Unread 10-19-2011, 07:31 PM   #9
twistedfreak021
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im getting right at 19 also worth my 4 door auto and looking at putting the rk 2.5 and 35s on it so good info to know thanks
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Unread 10-19-2011, 07:38 PM   #10
jrod250
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I have an auto with 3:73 gears, 35s and a 2 inch lift and I'm getting 17-17.5. Thats actual mileage using a calculator and not relying on the on board estimate which shows exactly 1 mpg higher. I am very easy on the skinny pedal and used the AEV pro cal.
And believe it or not if you've removed the plastic air dam on the front that KILLS your mileage. I removed mine and my mileage dropped to 13.2. I put it back on and immediately got my mileage back.
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Unread 10-20-2011, 03:34 AM   #11
SJMUDWRANGLER
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thanks for the info ,i really want 35's but i gave up a truck that was stock (tires)( to get better gas mpg. I only run highway,.Dam they look like they belong on 35's too, my jeep only has 7200 miles on it, im not looking forward to changing gears yet, i guess i'll stick to 33's for now. I already have the top gun leveling kit to counter the 35's.
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Unread 10-20-2011, 08:11 AM   #12
Joevacs
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Quote:
Originally Posted by SJMUDWRANGLER View Post
I have a 2011 jk auto, with the stock sneakers.I'm averaging 18.5 mpg's at 70mph for my 50miles a day ride to work. I'm tossing the idea of 33's or 35's on a 17x9 mt sidebiter. Just trying to get some input on what mpg everyone is getting on 33's and 35's.
Here's something to consider. I found that the right balance of gears and tire size can get you better mileage at whatever size tire you go with.
I had 35s and 5:13 gears and got an average of 14.5-15 mpg driving to work on mostly winding country roads. On the interstate running 65-70 mph, I only got around 13mpg. Then I switched to 37" tires. I now get 16.5 mpg average, driving to work, but on the Interstate I am getting 17-17.5 mpg. The balance of the gear ratio and tire size is matched better now and overdrive doesn't go in and out as much because of that. My tach. is right on 2k rpms running 60 mph now.
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Unread 10-21-2011, 02:13 AM   #13
SJMUDWRANGLER
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thanks for the info ,i will definetly look into that
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2011 JEEP JK SAHARA UNLIMITED, BLACK ON BLACK, TRAILER HITCH, LOCKING FUEL DOOR, HYLINER FRONT ROCK BUMPER WITH LIGHT BAR,AND WINCH MOUNT,2.5"/2" TOPGUN CUSTOMZ LIFT LEVELING KIT,TINTED WINDOWS,ZONE 3"SHOCKS





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