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View Poll Results: How Accurate is your Jeep's MPG Estimate?
Very Accurate 10 38.46%
Somewhat/Fairly Accurate 14 53.85%
Hit-Or-Miss 0 0%
Completely Inaccurate 2 7.69%
Other 0 0%
Voters: 26. You may not vote on this poll

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Old 07-19-2012, 11:52 PM   #1
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Gas Mileage Tracker

How accurate is yours?

My jeep is just about to hit 1500 miles. 4" lift, 35" tires, 4.10 gears (Rubicon). Speedo is of course corrected.

I have to admit that I'm impressed with the mileage estimator on my Jeep. Excluding the first two tanks where it was "learning", I have to say that it's been spot on ever since. Here's my fill up from tonight. Talk about accurate!


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Old 07-20-2012, 12:15 AM   #2
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i still check mine with a calc every time i fill up. its always close, within a few 10ths any way. 2500 miles and getting better

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Old 07-20-2012, 06:56 AM   #3
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Both my '11 and my '12 are always 1.0 MPG too optomistic at the end of a tank. So I reset the display each time I fill up, and then whatever the display shows, I just subtract 1.0 and it gives me my exact mileage.
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Old 07-20-2012, 07:18 AM   #4
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mines very accurate. better now that i procaled the tire size.
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Old 07-20-2012, 10:21 AM   #5
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I'm almost always within a couple .tenths of what my GPS program tells me....although sometimes the GPS is off by however many miles I've gone without it being plugged in....

"Accurate enough" for my needs in any case.
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Old 07-20-2012, 10:38 AM   #6
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I watched mine closely for the first several fill-ups, and would hand calculate the MPG's and compare, and also re-set when I filled up. It was always within tenths, sometimes slightly over and sometimes slightly below. It was close enough for my concerns, so I just take it for what it says now.
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Old 07-20-2012, 10:49 AM   #7
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Quote:
Originally Posted by WXman View Post
Both my '11 and my '12 are always 1.0 MPG too optomistic at the end of a tank. So I reset the display each time I fill up, and then whatever the display shows, I just subtract 1.0 and it gives me my exact mileage.
X2

Mine always shows 1MPG more than what I actually got, after I do the calculations at the pump
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Old 07-20-2012, 02:41 PM   #8
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I use a free site called fuelly to calculate the real mpg and track cost. It's easy and I would recommend it. This is my page-> 2012 JKR 2DR Silver 6-Speed (Jeep Wrangler) | Fuelly

Based off that and resetting the avg mpg in the Jeep as soon as I fill up, the car will be within 1 mpg. I don't have the EVIC upgrade (electronic vehicular information center). I'm not sure if that makes a difference?
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Old 07-20-2012, 02:50 PM   #9
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Quote:
Originally Posted by WXman View Post
Both my '11 and my '12 are always 1.0 MPG too optomistic at the end of a tank. So I reset the display each time I fill up, and then whatever the display shows, I just subtract 1.0 and it gives me my exact mileage.
My '10 is 1.0 too optimistic too. It seems to be a common result in most JK's
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Old 07-22-2012, 01:21 AM   #10
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I have to say that I'm intrigued by the results so far. It seems strange that it's exactly 1 mpg off for so many folks.

For those who voted completely in accurate, can you tell me how far off yours is? Have you changed gears/tires/wheels?

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