I have a 16 xd pro 4x that is having trouble starting when the temp drops to 10 F and below. So far I have been towed to the dealer two times in 4 days. It seems like is turning over fast enough to start but only for one start then it gets slower and slower and finally after 4 or 5 attempts won't even crank at all. The first time the dealer charged the batteries changed both fuel filters ($160) and load tested both batteries for me and sent me on my way. Two days later dead as a door nail. . I have put a whole container of anti gel in after just to make sure (I have been using it right along) its not geling up. The dealers say the batteries are good and won't replace em, so I would assume they are going to blame it on fuel (which could be my problem) Its at the dealer right now we will se what they say after the new year. ANY IDEAS on how to handle Nissan ?