Would there be any merit in asking a dealer to list the exact jobs done, price of all parts used and the time it actually takes to do the jobs in question?
I bet the total cost of oil and parts, time etc is less than the price of what is otherwise known as a 'first service'.
Just cos us mugs have to have it, and know it costs an arm and a leg, does anyone actually question the dealer on the specifics of it's content.
Just a thought