Wow! So much hostility here today. Back to the topic.

3.5 is correct with a new filter. S/C engine and not only does it match what both the owners manual and the service manual states but it also matches what the dipstick shows.

You had your oil changed by a hack. He might be a nice hack but he's a hack none the less and you really need to either go somewhere else or better yet learn to do it yourself.

Good luck.