I can hear the element start to heat about 10 seconds after I plug it in, sounds like a hot stoker in water if you listen by the grille,also when kept in garage sometimes the glowplug like doesn't come on.
I live in northern Minnesota and have always run straight number 1 in the winter with Diesel Kleen and have never had any problems. The local Cenex has it. Seems like all the other station carry only blend.
Topkanman there is a TSB on a cold weather front I got one last year free, I think because I'm in a snow state anyway I was out 20 miles today in heavy snow and I open my air filter and checked when I got home and it was dry and a bone. I have the cold weather front on.
What I have read on post is the theory that if it hasn't been changed at the recomended intervals and is then changed at higher miles it will lossen particals and cause problems.
Montyb is the update TSB 08-04-08 something they do to the air intake or is it the grille cover others talk about. Just called my Ford dealer and he checked my vin number and said to bring it in , the update under warranty wasn't done yet.