i have the same setup in my journey. we have found the best MPG is running about 62MPH or about 2000RPMs. at first we towed a TOAD that weighed just under 5,000lbs and the mileage never changed that much with or without the TOAD. the range has been between 8.6 and 9.8MPG.
and now that is is just barely broken in with about 25K miles, we are selling it. we just ordered a new Tour 42QD last month. now i have to see what kind of mileage that 450hp gets.
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Retired Army--Bob--2018 Allegro Bus 45OPP
2018 GMC Canyon SLT Crew Cab 4WD
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