Good points both. Didn't think of protecting the back seats. I took the front wheel off my bicycle and was hoping that I could put in in the trunk with the seats folded down. But when I put down the rear passenger side seat and looked at the room I didn't even bother. Now I have to use my Explorer (17 - 18 mpg) when I take the bike or get a new bike rack.
I can get a relatively inexpensive rack that hooks to the trunk, but the car is a week old and I can't stomach the thought of attaching metal hooks to the car's finish. The other possibility is a receiver to the back of the car so I can hook up a hitch mounted rack, but that option is probably $500 to $700.