Well obviously all of the diesel Jettas get excellent fuel mileage. On wikipedia for the Jetta A3-A5(1996-2010) they list these engines(seems like a lot of variants), for the transmission I am assuming a manual is always going to beat an automatic for mileage because of efficiency losses, but I...

If you believe all the hype, I should be getting about 55 mpg (Imperial gallon) from my 2009 Jetta tdi, yet at 60 miles per hour with a slight tailwind, all I get is 46 mpg. Is anyone else experiencing poor fuel economy in the 2009 clean diesels? Any advice?