Thanks for the info, though I couldn't tell though whether that's a turbo or not. I think that could be the issue with gas engines. Consider for example the recent thread about synthetic oil, suggests something may be a bit marginal in that area, and dragging a heavy load could put it over the edge. All speculation on my part, of course, but it is sort of funny that that's the only engine VWoA didn't give a rating for.
Turbo gas engines always seem like they are running on borrowed time in the best of circumstances. ;-)
Mike