I didn't ask any further questions after the $90 quote for oil changes. :P I imagine they would charge more for additional inspections, which I would do anyway while changing the oil and rotating the tires.
Quick question, before I post a new thread, does anybody know when the recommended interval is for transmission fluid changes? The service manual calls for an "inspection" every 15k. Seems like a very frequent change interval, but I don't really know how one goes about "inspecting" a lubrication fluid.