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Your MPG and The Mods That Got You There
06-25-2009, 09:25 AM
#21
JK Enthusiast
Join Date: Oct 2007
Location: White Plains, MD
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I'm getting around 20 on the highway and 17 around town, with my 37 inch tires.
Specs (not sure what helps the most, maybe a combination of all):
37 inch tires
4.10 gears
TrueFlow XDI Cold Air Intake
Flowmaster 40 Series Exhaust
Banks Headers
Like I said, not sure what helps me get where I am, but something is definitely working right for me to get this kind of mileage with my 37s.....
Specs (not sure what helps the most, maybe a combination of all):
37 inch tires
4.10 gears
TrueFlow XDI Cold Air Intake
Flowmaster 40 Series Exhaust
Banks Headers
Like I said, not sure what helps me get where I am, but something is definitely working right for me to get this kind of mileage with my 37s.....
06-25-2009, 10:00 AM
#22
JK Enthusiast
Join Date: Apr 2009
Location: St Louis, MO
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my city mileage is better
I'm ashamed to admit I'm still bone stock (unless you count slush floor mats or peeling the airbag stickers off the visors).
Manual trans
Stock X tires, which I think are 29" tall, and 3.73 gears.
I get between 18-21 mpg in the city, depending on how I drive, AC, etc.
I get 16.5 hwy because I drive too fast. 80 mph is about 3000 rpm, but i wouldn't know that since I always do the speed limit.
I keep trying to tell the little lady that getting new wheels and tires would actually help my mileage and could save us money in the long run
, but she's not buying it.
Manual trans
Stock X tires, which I think are 29" tall, and 3.73 gears.
I get between 18-21 mpg in the city, depending on how I drive, AC, etc.
I get 16.5 hwy because I drive too fast. 80 mph is about 3000 rpm, but i wouldn't know that since I always do the speed limit.
I keep trying to tell the little lady that getting new wheels and tires would actually help my mileage and could save us money in the long run
, but she's not buying it.
06-25-2009, 10:16 AM
#23
JK Enthusiast
Join Date: May 2008
Location: Tampa, FL
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Yeah, I tried this with the muffler and intake. Not too much of a lie there, but still not worth the price...
Bigger Tires = Better Gas Mileage
Not sure I could pull that one off either.
06-25-2009, 12:32 PM
#25
JK Super Freak
Thread Starter
Join Date: Feb 2009
Location: Orange County, CA
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Im glad to see all of the responses, this could turn out to be a very helpful thread to many people There are definitely some people who I can tell need the extra mpg, myself included
There are definitely some people who I can tell need the extra mpg, myself included
06-25-2009, 01:07 PM
#27
JK Newbie
Join Date: Jun 2009
Location: Levittown, PA
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Re-Calibrate
I've noticed that a few of you running 35's have low mileage; when others running 35's or larger have decent mileage, 19+.
Those of you running 35's and getting 12 mpg, have your re-calibrated to account for the tire size? If not, once you do you will see the increase in mpg. With the bigger tires you are actually traveling a greater distance in each tire rotation, so your distance over-all is greater, but your vehicle thinks you're running stock and calculating your mileage based on that.
I'm running stock right now since I've only had my JK for about 3 weeks, but when I had my 82 CJ7 I was running 37's. Not that my mileage was great, but re-calibrating the odom helped to see the real mpg.
Those of you running 35's and getting 12 mpg, have your re-calibrated to account for the tire size? If not, once you do you will see the increase in mpg. With the bigger tires you are actually traveling a greater distance in each tire rotation, so your distance over-all is greater, but your vehicle thinks you're running stock and calculating your mileage based on that.
I'm running stock right now since I've only had my JK for about 3 weeks, but when I had my 82 CJ7 I was running 37's. Not that my mileage was great, but re-calibrating the odom helped to see the real mpg.
06-25-2009, 03:53 PM
#29
JK Enthusiast
Join Date: May 2008
Location: Tampa, FL
Posts: 323
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I've noticed that a few of you running 35's have low mileage; when others running 35's or larger have decent mileage, 19+.
Those of you running 35's and getting 12 mpg, have your re-calibrated to account for the tire size? If not, once you do you will see the increase in mpg. With the bigger tires you are actually traveling a greater distance in each tire rotation, so your distance over-all is greater, but your vehicle thinks you're running stock and calculating your mileage based on that.
I'm running stock right now since I've only had my JK for about 3 weeks, but when I had my 82 CJ7 I was running 37's. Not that my mileage was great, but re-calibrating the odom helped to see the real mpg.
Those of you running 35's and getting 12 mpg, have your re-calibrated to account for the tire size? If not, once you do you will see the increase in mpg. With the bigger tires you are actually traveling a greater distance in each tire rotation, so your distance over-all is greater, but your vehicle thinks you're running stock and calculating your mileage based on that.
I'm running stock right now since I've only had my JK for about 3 weeks, but when I had my 82 CJ7 I was running 37's. Not that my mileage was great, but re-calibrating the odom helped to see the real mpg.
