I'm quite pleased that the mileage has actually increased over time, and I'm still keeping about the same ratio of city-to-highway driving. I do believe warmer weather has improved the economy as well, as any car I've ever owned got lousy mileage in the NY winter. I don't drive much as a rule, as only 5100 miles in 8+ months will tell you, and the majority is to/from work, an 18 mi. round trip. To get 37 mpg avg. in that environment is quite satisfactory, esp. since messr. smart is the most nimble ride I've ever owned. Raw power isn't everything... (more)