Zodiac took a lot of liberties with the facts . A lot of the film is complete fiction or speculation . Because it ' s based on a true story , I can ' t give it the respect I would have if it had been more a more accurate retelling of facts . Personally , if you ' re going to just ignore what happened or portray real life relationships in a phony way , just make up another story . Don ' t tell me it ' s the Zodiac story and then not represent the characters in the film in an accurate way . Wellshot ? Yes . Good acting ? Yes ? Music , costumes , good . True ? Not hardly . <| sep |> When should I replace my oil ? My dealer is telling me to bring it in for oil changes like every 8 K miles . Isn ' t that excessive mileage ? It ' s a Countryman S all 4 .