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Discussion Starter #1 (Edited)
96 powerstroke only 13 mpg

I have a 96 automatic powerstroke that I just bought, it is straight piped I believe 4" the whole way and a 6 position power chip and I making only 13 mpg with it. I even tried a tank where I turned it to stock and babyed it but still 13 mpg. Does anyone know what could be going on? I would really appreciate some help.
 

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I have a 2001 7.3 with just about the same setup. .minegets about the same...it tends to riseafter an oil change and new air filter..doesnt go up much tho at best 15mpg
 
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