I Was A Loyal Chrysler Owner / Operator For A Couple Of Decades.
A 2009 with 9,000 miles needs a head gasket and it’s not covered by warranty ? What ?
I’d get the car out of there and see if I could take a fuel sample and see if I could get it independently tested for contamination of some kind that would lead to a blown head gasket.
You could try another dealer and see if they are more user friendly.
By the way, I wouldn’t advise working on (I’m not talking about the oil change) or replacing parts on this car while it’s under factory warranty.
CSA