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-   -   4 banger not getting good mpg? (http://www.wranglerforum.com/f290/4-banger-not-getting-good-mpg-66747.html)

ktmburtonrider 10-26-2010 08:04 PM

4 banger not getting good mpg?
 
i have noticed that my 4 banger is just flying throught the gas lately. its lifted 2 in suspension w/ 31's. any ideas why my fuel economy would be so low? im talking 9-10mpg? shouldnt it be around 15-20? i understand that i have a lift but i still think that it can be improved. ANY IDEAS?

Alexjk 10-26-2010 08:24 PM

check the lttle things first like fuel filter, air filter tire pressure, so on and so forth... i dont know what my mpg is but i know it blows but ive got a 4 inch lifting pushing 35s....

ktmburtonrider 10-26-2010 08:29 PM

yeah i got a k&n air filter that i just cleaned. but i havent look at my fuel filter. will take a look at it

JDsDream 10-26-2010 08:37 PM

You have to take into consideration that with the lift and larger tires, your speedo is going to be off a little. That in turn will mean that the mileage will be off as well. Use a GPS to figure out what the difference in actual speed and mileage are.

InfernoGirl 10-26-2010 09:20 PM

And your lift doesn't affect your MPG's, tires and wheels do. How long since your last tune up? O2 sensors good?

wasomma 10-26-2010 11:25 PM

Quote:

Originally Posted by JDsDream (Post 842791)
You have to take into consideration that with the lift and larger tires, your speedo is going to be off a little. That in turn will mean that the mileage will be off as well. Use a GPS to figure out what the difference in actual speed and mileage are.

yea take stock tire size and divide it by new tire size and multiply your MPG by the new value to get actual MPG

InfernoGirl 10-27-2010 08:25 AM

Quote:

Originally Posted by wasomma (Post 843391)
yea take stock tire size and divide it by new tire size and multiply your MPG by the new value to get actual MPG

I did that, and my total came out worse...... I don't think this is right... :)

30/33=.9 14.4x.9=12.96mpgs ??????

InfernoGirl 10-27-2010 08:27 AM

Quote:

Originally Posted by wasomma (Post 843391)
yea take stock tire size and divide it by new tire size and multiply your MPG by the new value to get actual MPG

I did that, and my total came out worse...... I don't think this is right... :)

30/33=.9 14.4x.9=12.96mpgs ??????

Do you maybe divide the new size by the old? That gives me a little better mpgs....


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