I used to get flyers from the Mits dealer all the time back when I owned my 3000GT trying to get me to do their "maintanence" checkups. I called them to satisfy my curiosity and they said they rotate the tires,change the oil,and "inspect" the air filter,and some other nonsense crap at the tune of around $250. Dealerships just like to prey on people to lure them in and empty their wallets.