Rvfool

I eat DEF when I tow my 7200 lb Travel trailer. Add 2.5 galleons in Flagstaff AZ and showed 70% full on idash. Soot load 8%. Drove to Las Vegas NV (about 240 Miles), going 65 mph on cruise control. Got of Vegas and said I had only 247 mile left message. Still showed 53% def on Idash and dash bar display. I have this condition before. It would get to 150 miles left then 10 miles later say limiting speed to 65 mph in 100 miles. Once it even said I was out of def. the gage system is total unreliable on the 3.0 l. You need to carry DEF with you when you tow as the 3.0 is a DEF Hog when you Tow. What is funny you can see you soot load being reduce while towing but not around town when not towing. Around town it increases until you get to 100% then it going into active regen. Never see regen active with towing but acts like it is in regen.