Great comments above all. The 240 is significantly simpler to maintain because it has less power stuff to take care of. That said a 240 on the highway is a bit tedious with a stick and downright lethal to the non wary on the highway with a slush box. The SD is a sweetheart on the highway and gets about the same economy as the 240 if driven the same speed due to its more slippery shape.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.