Bought the 2008 Focus for the price and gas mileage. I am still on first tank and the mpg keeps climing. Can I believe this? Sometimes for long stretches it says I am at 55MPG. Usually goes to 43 or so. Only when I am going slow or accelerating fast does it drop. Could this be true? I have driven it 3 days now and my gas gauge as barely budged! Other than that the car is OK nothing exciting. Black window trim came loose before I got it home. I had to snap it back in myself!