Wait...no one whined about a 3 year old thread?
I've been paying about 50 cents less for diesel around here than regular grade gas. Diesel was almost a dollar cheaper not that long ago. I was hoping to find a diesel van, but ended up with one powered by a carb'ed 460 with a non-overdrive trans. I figure I'll be lucky to see 8mpg out of this thing.
So no, MPGs really wasn't much of a concern to me
. Like others said, the higher acquisition cost really does offset fuel savings to the point that I'd likely never even hit the break even point anyways. I'll likely have less than 5 grand total, including buying the van in this one, and that savings will buy a LOT of $4/gallon gas.
Though really, my preference for diesel has more to do with the lower running RPMs, so I'm not listening to a gas motor screaming at 4,000RPMs pulling a grade. Better MPGs are just a bonus, but then additional maintenance costs often tends to offset that too. I haven't run the numbers in a while, but I do know that my gas powered Ram pickup cost me less on a per mile basis than my diesel Ford and Chevy pickups do.