I just got this deville with 125K on it; I always thought that checking your fuel economy was a good way to tell how the car is running. Anyway, I live in Buffalo, and its in the 30's right now so its cold. I do mostly city driving, with an occasional 5 mile or so highway stint, but Id say 90 percent of my driving is city. Anyway, my computer said 17.2 mpg, but its wrong, its gotta be. I did calculated myself by how much gas I had to take to refill as opposed to how far I drove and it took 151 miles on 10.8 gallons (about 14 mpg). Is this right? Remmebr, my computer one said 17.2 for those of you who go by that; I just want to make sure shes running [email protected]!