I just started using www.fuelly.com to track mileage on my "new" 1999 SL. So far I am pleased with the results. I was getting about 17 MPG in the truck I had been driving back and forth to work.

 

Oh, yeah!! Nothing quite like almost doubling your gas mileage in one move, eh? Mine was almost the same, came from an 05 Escape (wife's vehicle now) at about 14 to 16 mpg to my 99 SW2, whic has only given me one tank so far at less than 31 mpg, and that was just because I was getting used to how spirited the performance was from the dohc 1.9...really light car, not much wind resistance, a lot of factors figure in!