The Titan's are getting 15 empty (read the reviews), that's worse than gas. And the Titan HD's have some serious issues. Lot of buybacks for both engine and suspension/steering issues.

Dunno about the ecodiesel but the chevy colorado diesel gets like 2-3mpg better than the gas. Big Fuggin Deal.

Seriously gas mileage is a nothing, even if you drive 500 miles a week (which is a ton). Do the math.

Think in 5 years, who is going to work on your oddball little diesel. (yes, the 3/4 diesels have a lot of places to be worked on) but there is probably 1 or 2 mechanics at the dealership who got ecodiesel training and can actually work on it. Parts are dealer only, etc. And the emissions shit is incredibly complex. Remember when Jeep had a little diesel for the Grand Cherokee. Yeah, probably not. Lasted 2 years. it's pretty cool, but parts are tough and nobody works on it.

Really with all the stupid new diesel emissions (post 2010) it's barely worth having a diesel at all. Your older Dodge is probably worth more than newer diesel with miles. (and certainly than a Ford 6.0 but that's unfair. :-) )