Noticed yesterday when I filled up,the gas gauge stayed at quarter full, and then gradually went up to "full" over a distance of about 10 miles; may have happened before but I just didn't notice. Also after driving about 2-5 miles after a fill up, the CEL will come on and stay on until the car has been started 5 or 6 times when it shuts off - this has happened for the last 3 months every time I fill up since I've owned the car. On the plus side, did a round trip yesterday of about 300 miles - all highway and very little traffic, cruising at 70 mph - gas mileage was an amazing 37.5 mpg! (UK gallons).