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hi, just wondering what you guys think i should be around, i have a 2003 f350 ext cab dually. it is reading on the computer 12ish, that seem right, and what can i do to increase that a lil bit. thanks for the help
 

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My duallie usually would get 15 on the highway and less in town. One of our tuners will be your best bet for increasing the fuel economy.
 
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