If you are still under warranty I would be sooo pissed right now. If you have an 08< the car is only 4 years old, and you are under the mileage warranty. you should be able to drop the car off, get a rental and only have to pay for the gas and insurance for that rental car. It sucks how you sometimes have to be a jerk to get your way with the dealership, but thats what I would be doing, go in face to face and keep asking questions and talking to higher-ups until you get what you deserve. I asked my mechanic about your situation and he didnt give much help. he said it could be alot of different factors and would need to check out the car. I wish I could help more but im scratchin my head on this one.