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Old 03-17-2014, 07:05 PM   #1
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Wtf ?? 13.5 mpg

My dash is telling me i'm averaging 13.5 MPG. My V8 Sport Trac gets better MPG than this. I went with Goodyear Silent Armor 285/70 R17 (roughly a 33" tire) on my 2014 2 door JK with supposedly 3.73 gearing and auto transmission. is this common to have such shi**y gas mileage? I drive like grandpa, my office is 1.2 miles from home and only 600 miles on it. Would a ProCal adjustment for the bigger tires result in a more accurate MPG estimate? Would a ProCal adjustment actually give me better MPG? Thanks.

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Old 03-17-2014, 07:10 PM   #2
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The procal adjustment will help a little as long as you are close on the tire size but do yourself a favor and actually figure out your gas mileage manually. That goofy guage will drive you crazy. Use your trip meter and zero it out when you fill up. Its on the dash near your speedometer. Drive until you hit a quarter tank and gas up. See how many gallons you used and how many miles you drove. I.e. 150 miles and 10 gallons of gas = 15 MPG.
Dont get crazy wishing you are going to get hybrid car mileage with the Jeep. Its made to suck gas. Good Luck. BTW my 13 automatic sport with 315-70r17 duratracs gets about 18 mpg hiway and about 14 around town on average.

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Old 03-17-2014, 07:12 PM   #3
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With such short driving and your jeep not really getting operating temps even stone stock mpg gonna be low
Try do yourself a favor
Reset the gas computer
Go for nice drive more steady speeds between 50-65 mph
See what your getting
Hope this makes you smile
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Old 03-17-2014, 07:16 PM   #4
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With only driving a little more than 2 miles a day I am surprised it is not lower.
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Old 03-17-2014, 07:19 PM   #5
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^^^
I live just under 4 miles from work with 6 traffic lights and im averaging 11.5 and thats with manual and being gentle on the peddle.
2014 jku rubicon x
It sucks but i didnt buy the jeep for gas milage.
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Old 03-17-2014, 07:22 PM   #6
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It sucks but i didnt buy the jeep for gas milage.
So true. I should put that in my signature.
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Old 03-17-2014, 07:38 PM   #7
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Quote:
Originally Posted by Jeffcs View Post
With such short driving and your jeep not really getting operating temps even stone stock mpg gonna be low
Try do yourself a favor
Reset the gas computer
Go for nice drive more steady speeds between 50-65 mph
See what your getting
Hope this makes you smile
Yup

I've been averaging between 19 and 21 with my ~80 mi daily commutes. But it's hard to get above 16 or so within a few miles of my house because nothing's warmed up and there's a lot of stopping/getting up to speed.

A 1.2 mile trip would be a challenge to get good mileage. Check out some hypermiling techniques from the Prius crowd like pulse-and-glide. Try to use hills to your advantage, drive the speed limit, don't idle, don't warm up, try to keep it in the eco zone.

But on the flip side, you're not using much gas for that distance even at 13 MPG.
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Old 03-17-2014, 07:44 PM   #8
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Don't forget that if you haven't made a ProCal or similar adjustment for the larger tires, you are are actually traveling further and faster than the odometer and speedometer think you are. With that being said, you are actually getting better gas mileage than the computer is calculating. Even if you attempt a manual calculation, you will be off because your indicated miles between fill ups will be lower than the actual miles travelled.
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Old 03-17-2014, 08:38 PM   #9
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That's what I'm averaging- 8 mile commute.
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Old 03-17-2014, 08:45 PM   #10
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That is more than what I got this winter.....and I'm stock.
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Old 03-18-2014, 05:22 AM   #11
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With winter gas and short drives you should consider yourself lucky--look at the bright side with a 18 gallon tank you still don't have to fill up more then once a month
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Old 03-18-2014, 06:59 AM   #12
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I drive about the same mileage as the OP each day to work, with a 10 minute warmup, my MPG are about the same or a little better each week. But I knew it wouldn't be good on gas, after 1900 miles I am averaging 14.7, mainly due to a few long drives in-between.
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Old 03-18-2014, 07:00 AM   #13
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13.5 MPG? Oh man you lucky lucky dawg... would love to have that kind of MPG.
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Old 03-18-2014, 07:04 AM   #14
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Short trips will kill it. Even with 33" Duratracs and a small lift mine would bag up 17-18 miles per gallon easily on my 15 mile commute to work city/highway mixed. On a highway trip, 19-20 easy.
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Old 03-18-2014, 07:14 AM   #15
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Not going to do much too much better with city stop-and-go driving and short trips. My 22-mile each-way commute will end in a couple of months, or I'd buy an inexpensive economical vehicle as well. I get about 17.5 (80% highway/20% city) on my commute with stock 32s. Better on all highway though.
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Old 03-18-2014, 07:19 AM   #16
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Not going to do much too much better with city stop-and-go driving and short trips. My 22-mile each-way commute will end in a couple of months, or I'd buy an inexpensive economical vehicle as well. I get about 17.5 (80% highway/20% city) on my commute with stock 32s. Better on all highway though.
My short drives are why I wasn't too worried about buying the Jeep, gas is really not the most expensive ownership cost. I do more like 90% city, 10% highway, so the Jeep was a nice option. I might have picked up a Subaru Outback or maybe the new Cherokee Trailhawk, if things were reversed.
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Old 03-18-2014, 07:27 AM   #17
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I was getting 22 l/100km this winter, which is just over 10 mpg. The engine is still new, and the temps were brutal cold (-40's). I had longish startuip idle times.

Now the weather is warmer, and I hit 13.3 mpg.
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Old 03-18-2014, 12:07 PM   #18
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I'm in the same boat. 2 mile commute. I was looking at the gauge and got concerned at the numbers. Then did a reset on a longer trip and got more in line with what I was expecting.

Also, put it in perspective. If you're getting 12 mpg on your commute.. you're burning all of 1 gallon of gas a week driving to work, instead of the 2/3 a gallon in your sport trac. That sport trac was saving you like... a buck and a quarter.
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Old 03-18-2014, 12:10 PM   #19
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Its called smiles per gallon, not miles per gallon
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Old 03-18-2014, 12:16 PM   #20
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Same here. 12-13 mpg with 2-3 mile commute (TJ not JK). My best tank ever (all freeway on a clear sunny day) was around 14 mpg.
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Old 03-18-2014, 01:16 PM   #21
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Its called smiles per gallon, not miles per gallon


Good attitude ....
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Old 03-18-2014, 06:34 PM   #22
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Thanks everyone.

Somewhat comforting to see that i'm not alone in this. "Smiles per gallon." That is the right attitude. I like it. I'll still probably get around to getting a Procal and adjust to the tire size. Thanks again everyone.

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