You can ask me anything you like about the 3.5 Eco's as I have 2 of them an 11 and 18....the 11 has over 80k miles towing alone on it and the 18 is at 60k now with 45k miles towing on it. Use it to tow our rig all over handles anywhere we take it and with ease..The 18 is also my current daily as well..gets 18mpg city as a daily and 9mpg avg when towing as well...and we don't tow on flats its mostly all through the blue ridge mountains of WV VA NC...been to Fl from Pa and back many many many times...love the trucks and that engine and the 10 speed tranny is flawless. When I step up to a larger rig I'll be looking at the 350 with the 7.3 and 3.73 axle for the next tow vehicle. The 18 did have the cam phasers replaced at 18k and has been perfect since apparently there are new updated parts they are using now it was a 4 hour fix at my local dealer done by noon that day. No other issues at all other than it makes me smile :) :) especially when I have the rig hooked up to the back of it....