Hmm. $3800 for no increase in fuel economy. But surely it should be faster than the Eco with 148 hp and 258 ft/lbs. Oh but no manual option...
My guess is that the real world MPG numbers will favor the diesel over the gas engine though.
Mine: 2002 Focus SVT: 142k, Sonic Blue, #1654, All Options
Mods: Tom's Tune, Borla, HFC, STS, Painted Machs, Euro Grill, FRPP Springs
Hers: 2010 Focus SES: 67k, Ebony, Auto, Moon and Tune