i bought my car from patrick and from my experiance it depends on who your service writer is. the first guy i had was awesome. he swapped out windshield wipers, cabin filter, and a bunch of other stuff when i went in for the scheduled brake fluid flush.
the last time i went in because my car was throwing a code (P0304) somehow from the time i got from my garage to the dealership it had morphed into a B-Code for an evap leak and there was no active DTC. the service writer wound't even give me the paper work from the service, he said that they would mail it to me after i asked him how the code changed from an active to a stored evap code.