Abnormal Gas Mileage - Toyota FJ Cruiser Forum
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#1 (permalink) Old 11-18-2012, 03:39 PM
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Abnormal Gas Mileage

I don't know how, but I've been getting 22-28 mpg on highway. I've got 34 in tires and steel rims.

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#2 (permalink) Old 11-18-2012, 03:42 PM
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#3 (permalink) Old 11-18-2012, 03:50 PM
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Re: Abnormal Gas Mileage

Maybe someone is putting gas in your tank without you knowing.


I've actually known someone who did that to a guy as a practical joke. The guy kept on and on about how great his mileage was.

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#4 (permalink) Old 11-18-2012, 04:13 PM
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Re: Abnormal Gas Mileage

Are you using the dash tripometer? It and the speedometer are not correct when you change tire size. A larger diameter tire takes less rolls to go the same distance as a smaller diameter tire. You need to figure out the percentage that the speedometer is off using a GPS then correct the amount of miles driven using that percentage.

With how heavy those tires and wheels are and having a lift, i'd be surprised if you were getting more than 19mpg.

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#5 (permalink) Old 11-19-2012, 08:59 AM
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Re: Abnormal Gas Mileage

My ultra-gauge has me around 21 mpg cruisin on the highway at times, but my average trip is usually 15-18.

28... is crazy. I can get 56 sometimes... when coasting lol
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#6 (permalink) Old 11-19-2012, 09:02 AM
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Quote:
bulldog6 previously said: View Post
Maybe someone is putting gas in your tank without you knowing.


I've actually known someone who did that to a guy as a practical joke. The guy kept on and on about how great his mileage was.
It's been awhile since I've had a good practical joke played on me. Send that silly jokester my way. I'll be standing by!

My Ultra Gage has me at 18MPG

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#7 (permalink) Old 11-19-2012, 09:04 AM
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Re: Abnormal Gas Mileage

does a scanguage get accurate info even if you change tires? no re-calibrating etc

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#8 (permalink) Old 11-19-2012, 09:17 AM
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Re: Abnormal Gas Mileage

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does a scanguage get accurate info even if you change tires? no re-calibrating etc
Pretty sure you have to calibrate it.

I could be wrong... would not be the first time.
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#9 (permalink) Old 11-19-2012, 11:43 AM
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Re: Abnormal Gas Mileage

Wow Wuddup! I didn't get 22 when mine was brand new and stock. (21 tops ever). Your not having a rack helps, but that's crazy.

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#10 (permalink) Old 11-19-2012, 12:47 PM
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Re: Abnormal Gas Mileage

Quote:
Layonnn previously said: View Post
Are you using the dash tripometer? It and the speedometer are not correct when you change tire size. A larger diameter tire takes less rolls to go the same distance as a smaller diameter tire. You need to figure out the percentage that the speedometer is off using a GPS then correct the amount of miles driven using that percentage.

With how heavy those tires and wheels are and having a lift, i'd be surprised if you were getting more than 19mpg.
If he hasn't corrected for larger tires, that would mean his gas mileage is even higher
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