American Graffiti, the surprise summer blockbuster that ignited the career of filmmaker George Lucas (director and co-screenwriter), is one of the most car-saturated movies that is not explicitly about cars. Set in Modesto, California, at the tail end of summer 1962, it follows the exploits of a quartet of recent high-school grads: college-bound Curt Henderson (Richard Dreyfuss), class president Steve Bolander (Ron Howard), the nerdy Terry the Toad (Charles Martin Smith), and drag-racer John Milner (Paul Le Mat). The action takes place on a single night against a backdrop of endless cruising. Lucas made the movie in 1972, and it was highly autobiographical.

The movie is newly available on HBO's streaming services this month, so we figured it was worth another pass down the main drag. Here are some lesser-known facts to know about it, in case you settle in for a rewatch or a first watch — it's highly recommended if you haven’t seen it before.