In an additional Ghostbusters reference, the original license plate on the Delorean actually read ECTO-88 in the novel, rather than being Parzival’s name, as it is in the movie.
Parzival’s car is one of the highlights of Ready Player One.
It doesn’t have the Ghostbusters logo on the doors.
It’s a classic Back to the Future Delorean complete with a flux capacitor and a red Knight Rider LED light on the front.