Hi,
I changed the oil on my Crossfire a month ago, no problem with that, just bought oil, filter and oil plug gasket. A bit more tricky was to get the service alarm indicator reset. As usual when I'm doing anything on my car I try to document it to help others.

You can read here if you feel it could be of any help:
2005 years Chrysler Crossfire: Oil change

I'm on my second year with my Crossfire now, I have solved a lot of smaller problem and I'm very satisfied with this little car, almost perfect for me. Most problem was with the emission control system, but also that is solved today.

Best regards
Lars