Two quick examples, one of which is probably still fresh in the minds of SoA fans;
In last night's episode of Sons of Anarchy, Gemma had a conversation with herself, somewhat like a soliloquoy, in the car on the way home from Abel's daycare.
In Boogie Nights, after Phillip Seynour Hoffman's character tries to kiss Mark Wahlberg's character on New years Eve, he sits in his car and repeats the line, "I'm an idiot" over and over.
I don't think either of those fits into your "Narrator" method, but that technique (where the character is just basically talking to themselves out loud) is definitely used.