You already know that "Grease is the word," but what about the rest of them? In this new sing-along version of the 1978 hit movie musical (itself adapted from a Broadway show), all the words you need appear magically on screen ("Seems mine is not the first heart broken ..."). Other than that, it's the movie you remember, in all its color-saturated, fantasy-'50s glory, where high school is for sock-hops, drive-in movies, shop class and falling in love again with that perky Australian girl. Directed by Randal Kleiser, the film stars John Travolta and Olivia Newton-John at their dreamiest. "Tell me more, tell me more ..." Starts Fri., July 30. AMC Loews