Originally Posted by
douglas.lindsay
I drive an unmodified 2005 Peugeot 307 HDI Sport. I'm one of these nerds that actually knows what mileage I get, and keeps a close eye on it. I get 54mpg in the city, and at least 63mpg out of town - yes, it beats a Prius by a substantial margin in both environments :-)
Don't forget about the difference between imperial gallons and US gallons.