Would not be surprised if they refurb old engines again, that's a lot of coin for a rig that does not take in too many runs, how ever if you got these new they would probably last twice as long as a refurb. I guess it all comes down to what kind of money they can come up with. Anyone know what it cost to refit an engine with a foam tank? When they did the macks did they just do the hose bed removal / tank swap or did they repower them, paint em, etc . ?? I no the work was done in house and they appeared to come out nice, I've never talked to anyone who operated with one so I don't know how they function but would be interested to hear if anyone knows.