Thread: fuel mileage
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  #18 (permalink)  
Old 07-05-2009, 08:50 PM
Highwaywrench Highwaywrench is offline
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Join Date: Jun 2009
Posts: 49
I currently have an F550 4x4 as a service truck. while realising it is a heavy unit, 6.41mpg is not doing it for me. Same as above posts, any suggestions.

I have already done the DIY intake, gutted the EBPV and have an exhaust on it.
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