Revealing: At one point John is complaining about the Beach Boys playing on his car radio, he reaches to the center console and motions turning the radio off. In a few other shots though, we see that the car appears to have no radio at all, the center console seems to have a large tachometer and speedometer there, but that's all.

Factual error: Although the movie takes place in 1962, at least one car is wearing a black background California license plate -- which were not issued until 1963.

Continuity: The movie takes place in 1962, yet the band at the dance is playing The Kingsmen version of Louie Louie which didn't come out until 1963.

Continuity: When Wolfman Jack was eating a popsicle, it had a cellophane wrapper, in those days they only had paper wrappers.

Factual error: When John Milner is getting the ticket from the cop, he pulls over in front of a movie theater. The poster for the movie "Cabaret" is clearly visible in the background several times. You probably wouldn't know this unless you are old enough to have seen the movie in a theater, as "Cabaret" was in theaters only a year or so before Graffiti came out, so isn't appropriate for the time AG is set.

Continuity: A windshield wiper is visible on Milner's coupe in only three shots. These occur when Carole gets into the coupe from the Studebaker and shortly after, when Milner is pulled over for a defective license plate light. All other shots of the coupe show only the stub of the wiper mechanism.

Continuity: When John is driving in his Ford and talking to the girl in the Studebaker, he drives past the same store "Marin Cameras" twice.