I would have to say the same thing that $600 actually is a very good bargain actually. And regarding your situation, why do you have to change your own oil since you are going to pay $600 to the dealer? Isn’t that supposed to cover everything? And why you have to do something yourself since you have already paid someone to do it for you. That just doesn’t make sense. Well, anyways, read the whole contract of what would they cover, so that you won’t lose your $600 value of service coverage.