So after towing for close to 7 hours total this weekend and watching the diesel fuel running out of my exhaust I'm starting to consider putting a chip on and new exhaust in the hopes of bumping up my MPG. As of now I'm getting anywhere from 8.3 to 9 which makes for a very expensive weekend. The question I have is this; how much will this really help and is it worth it to void my warranty? I had several issues early on with the truck and ford stepped up and produced me with a 200,000 mile warranty. Obviously if I got bolt on exhaust and a chip that didn't leave an "Imprint" would be ideal but realistically how much can I improve my MPG? BTW its an 09 F 250 with the 6.4 and 43,000 miles on it. Thanks in advance
Chris
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