Gas mileage on 35'S

[Jeeperjamie]

17hwy about 14city with my 35 bfg ko2s. But sad since my 08 3.8 JKU on 37s with tons of extra weight got 12 city and 19hwy

What gears. My 2010 JKU with 3:73 never got over 17mpgs on any 35 I ran. About 14.5-15.5 around town.

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[Godfadr]

16-17 for me.

 

[Sladecm]

Have you reset the computer for the tires, just curious. I'm mostly city myself but I'm still getting 16.5-17, it fluctuates. I also haven't reset the computer for the different tire size and when that happens I should go up to around 18. Running the same tires. Also what gear ratio do you have?

How do you reset to account for the bigger tires?

 

[Jeeperjamie]

How do you reset to account for the bigger tires?

You will need a tazer tuner, or JScan tuner or something similar. Procal, superchips etc... Or your dealership can do it for $125. JScan is under $100 though and has other options on it as well as reading check engine codes and resetting them. That's the route I'm going to go.

 

[OL1970]

How much do those Ridge grapplers weigh, just curious.

I believe right at 80 pounds.

 

[Capt. B]

I put the Tazer in this past weekend. You'll need to update the firmware first or you may get an error or 2. Seems to work great, tires measured and reset. Once you get the hang of navigating the menu it's pretty straight forward. mph is spot on now.

 

[Jeeperjamie]

I believe right at 80 pounds.

Appreciate that. Just trying to get a idea of the weight so when my 35's wear out I can make a better decision on if I want to bump up to 37's.

 

[Tlikethedrink]

What gears. My 2010 JKU with 3:73 never got over 17mpgs on any 35 I ran. About 14.5-15.5 around town.

4.88s on 37s. I had a decent amount of extra weight being run with steel wheels, bumpers and winch, on board air, usually with my spare in the cargo area and a hilift and shovel. She was a tank!
I did really keep it running great. K&N drop in filter and a custom exhaust.

 

[GladiGator]

I am getting 12 mpg on the street with toyo 35's on a Sport S with no lift and stock gear ratio. Is this the average or is something not right?

 

[Jeeperjamie]

I am getting 12 mpg on the street with toyo 35's on a Sport S with no lift and stock gear ratio. Is this the average or is something not right?

If you got 3:73 gears and haven't set everything for the tires I'd say that's about right.

 

[Slapping_Rabbits]

I am getting 12 mpg on the street with toyo 35's on a Sport S with no lift and stock gear ratio. Is this the average or is something not right?

Holy crap that's terrible!

 

[GladiGator]

If you got 3:73 gears and haven't set everything for the tires I'd say that's about right.

Set meaning I need to regear to get better mpg?

 

[Jeeperjamie]

Set meaning I need to regear to get better mpg?

No reset your computer on your jeep to recognize the 35" tires. Your speedo is off and not calculating your miles right. If you got 3:73 gears on 35's you should be somewhere around 14-15 average.

 

[Alabama Mud Machine]

With 37x13.50’s on 20x10 wheels, with the Tazer recalibrated with ECM for 37’s and the iDrive unit on U-7 I’m averaging around 14.6 around town.

 

[Pogoda]

Darn, that’s the mileage? I drive a Ram 2500 Cummins, get on avg. to work and back via town roads 14.7 and was hoping to do better with the Glad Rubi I just ordered. Ahhh geez. Well, at least I’ll be able to have a better clearance rig for hunting.

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