Sara Wolensky has no idea who Sandra Dee is. But she and her best buddy, Amanda Philips, know all the lines - and moves - to the song lampooning the 1950s Princess of Prude.

In fact, the two teenagers have memorized all of "Grease," the paean to hormonal longing that predates their births and ritualizes a time of Eisenhower innocence.And they're not alone. Across the land, if revival, video and album sales are to be believed, there are millions of others who've got the same chills.

Twenty years after it first appeared on screens, "Grease" truly is the "The Word." Paramount Pictures, hopeful the faithful will still come, is releasing a digitally remastered version next week.

"It's so carefree, so easy," 15-year-old Wolensky explained.

"Music today is so full of problems," she said. "Everyone I know is into `Grease.' "

"It's up. It's bubbly," Philips, 17, chimed in.

Even Randall Kleiser, the film's director, is nonplused by the phenomenon.

"I recently went to a midnight show with Olivia Newton-John and Didi Conn," two of the movies' stars, he recalled, his voice filled with wonder.

"It was like `Rocky Horror,' the audience was in '50s outfits, repeating dialogue, singing along, hand-jiving in their seats."

The cast offers unerring timing, and they seem to genuinely enjoy themselves.

No one is more infectious than the heartbreakingly young Travolta, turning That Walk into an icon as recognizable as the curl of Clint Eastwood's lip.

"It's been a mixed blessing," Kleiser said. Before "Grease," he had been known for small, sensitive films. After directing "Grease" he was saddled with a reputation for making larger-than-life fare.

It took Travolta until 1994's "Pulp Fiction" (where, for a few seconds, he parodies Danny Zuko) to recover. Newton-John never recovered. Channing, an actress known for her versatility on stage, found it hard to get away from "troubled girls" on screen.