That's scary - the dealer was looking in the wrong book! Right in your manual, under specifications and capacities, it shows 6.75 quarts. I don't know about anyone else, but after putting in 6.75 quarts, running the car, and rechecking, it's still a little low...mine has needed closer to 7 quarts.
Mine went the other way, I only need a little over 6. I think Jim let his drain better, or maybe mine wasn't quite level when it was draining or something. I put in about a 1/4 of the 7th bottle, and I was a little bit over.