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i have a 06 dodge with the cummins auto tranny looking for better fuel mileage. the truck only has 23 k miles on it i pull a 37 ft toy hauler will the preformance chip get me any better then 8 mpg ?
 

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i'd venture to say yes. but it all depends on you. remember if you play, you pay.. i get much better mileage chipped than i did stock. but 8 damn. that sucks. i pull a 37' toy hauler with 2 bikes, and 2 wheelers, and still get 13-14. good luck with finding some mileage, it sucks to have toys you cant afford to use
 
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