Get one of the new 50-state-compliant TDI Jettas or SportWagens and you can score a $1300 income tax credit on your next return. Though the idea of paying consumers to buy new cars is always a little economically and environmentally dubious, I guess Uncle Sam has decided it all pays off. VW claims that the Jetta TDI can get a very respectable 38 mpg and 44 hwy on diesel under real-world conditions, though the EPA's "estimated" mpg's amount to a more modest 29/40. Almost worth it!