Weave & mike N are both correct, about the UD's. The ones I owned were tough, but after 300k miles, you get worried about going to W.Tx, or OK. Never saw a dealer in those places, luckily, never had any problems. Well, other that a water seperator bowl broke, couldn't find one in McAlester,OK, so just unhooked the fuel lines, and by-passed it until I got home.
As much disrespect as the 3126 gets, at least there are many service options.
As much disrespect as the 3126 gets, at least there are many service options.