About a month ago we had the transmission replaced for an output shaft bearing whine under warranty. I changed my oil for the first time after that and find out they cut my engine shield all to pieces at that time. We had refused to have it done numerous times at that dealership and had them put a note on our file that we never want that done. They finally snuck in and did it and now my mileage has gone from an average of 42.5 to 36. My wife recently went to Kansas and back, a trip we do often to see relatives, and when she got back her mileage was 34.6! We usually get 40 to 42 MPG on that trip. I'm pissed! We called the dealer and need to call them back ion Monday.