sexyRTboi Posted October 11, 2012 Report Share Posted October 11, 2012 So I think I jinxed myself on another topic when I commented that my '12 DJR/T gets "great gas mileage". I just had the Journey into the dealer on Friday for its first oil change as well as to figure out why the tow package wiring didn't work. Long story short, they said it had something to do with my computer not recognizing that it has the tow package so they had to "fudge" the VIN# and tada! they work!! HOWEVER ... Since Friday my fuel mileage has been horrible! Typically I average 11.9 or so on the screen (hwy to and from work with some city) - I cannot get the truck any lower than 14.9 now! I just had to fill the truck up again tonight on the way into work - checked my trip odo and I only managed 410kms to that tank ..... I always get between 540 - 580 easily. What could the dealership have done??? Quote Link to comment Share on other sites More sharing options...
bigtsr Posted October 11, 2012 Report Share Posted October 11, 2012 Your EVIC averages could have been altered by the amount of idle time while at the dealer-who knows how long it sat running while in their possesion. I guess if you really want to be picky you could note the total engine hours run on the evic when you bring it in and when you pick it up. Quote Link to comment Share on other sites More sharing options...
AstralRT Posted October 11, 2012 Report Share Posted October 11, 2012 I have the tow package also, and I'm averaging between 14.0 - 14.5. It was worst than that, but it got better once I stopped using gas that contained ethanol. Quote Link to comment Share on other sites More sharing options...
sexyRTboi Posted October 16, 2012 Author Report Share Posted October 16, 2012 Okay ... I think the computer just had to have some time to sort things out again. Since filling up the last time Im now back to normal, if not BETTER than normal fuel mileage. I nearly had a stroke the other day when I looked down on the hwy and noticed I was averaging 7.5 !!!! - 90km/h with the cruise on. Since than with my commute of mostly highway with some city (St.Thomas to London everynight) Im back to my usual 11.5 or so. -- WHEW! -- Quote Link to comment Share on other sites More sharing options...
bigtsr Posted October 16, 2012 Report Share Posted October 16, 2012 Don't forget we are also using winter gas formulation at this point in time = worse L/100km . redtomatoman 1 Quote Link to comment Share on other sites More sharing options...
AstralRT Posted October 16, 2012 Report Share Posted October 16, 2012 Don't forget we are also using winter gas formulation at this point in time = worse L/100km . Please explain? Quote Link to comment Share on other sites More sharing options...
bigtsr Posted October 16, 2012 Report Share Posted October 16, 2012 All major refiners alter formulation (have for yrs) to promote easier starting/less water retention in their fuels. This is also a matter of climate/degree days so some areas i.e. Florida don't necessarily fall under the scheme. The additives used have the sideeffects of reduced mpg but easier starting in cold climates. Quote Link to comment Share on other sites More sharing options...
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