So as embarassing enough as it is to admit that I paid the $tealer to change my oil, I came back to me car to find they took my beast for a nice "test" drive, to the point where my 10.2 MPG average over the last 50-60 miles was down to 8.2. Not to mention the black on the rear of my exhaust pipes and drop in the fuel tank. I'm estimating a 10-15 mile trip. Is this common for those who have had their oil changed by the $tealer? I paid close to $250 for this damn oil change and I'm pissed that someone took my beast for a joy ride!