Other: When Sandy checks into school for the first time, she goes down to the office and the assistant principal gives her some forms to fill out. If you look closely, you'll be able to see that the top form is just a blank piece of paper.

Continuity: When Sandy is in her cheerleading outfit, her hair is pulled back at the top of her head in a ponytail. The ponytail is very long. Yet, in the rest of the movie, her hair is short.

Continuity: At the dance-off, near the end of Cha-Cha and Danny's dance, they move from the back to the left side of the ring of people around them, and then in the next shot they're at the back of the ring.

Other: The entire "Greased Lightning" number repeatedly goes in and out of focus.

Continuity: After Danny has danced around the car with the saran wrap he is shown spinning around numerous times, and then stops with his back to the camera. However, in the very next shot, his arms are suddenly up in a pose far too quickly for him to have done in the time alloted.

Continuity: At the start of the Rydell fight song at the dance, Patty is standing right at the front of the stage. One second later, she is at the back of the gym.

Continuity: At the beginning of the National Bandstand scene you see people filling the hat of the big "Rydell Ranger" figure with pieces of paper. During the next ten minutes the figure is often visible in the background and the hat is empty - nobody emptied it. After those ten minutes the hat has paper again and is then emptied.

Continuity: Just at the beginning of the Hand Jive dance off, Patty and Marty are standing in front of the big float figure. The hat tips and paper falls on both of them. In the next shot, as Patty is crying, Marty is no longer there, but there are a couple of guys next to Patty attempting to fix it.

Continuity: When the girls are all sitting in the outside cafeteria just before Patty Simcox comes over watch Marty. When Patty approaches she is lifting her fork to her mouth but when the shot changes she is holding out her hand to get Patty's card without having enough time to put her fork down in between.

Visible crew/equipment: In the scene where they are singing Grease Lighting - the part when the fuzzy dice float to Kenickie - after he takes them "out of the air" and swings them around, then lets them fly - if you look close to his head you can see the white string they were attached to when they were "floating".

Factual error: In the scene where Danny is talking to Sandy at the Frosty Palace, the jukebox behind them is a 1973 model, but the film takes place in 1959.

Continuity: When Cha-Cha receives the award from Principal McGee at the end of "Born to Hand Jive" at the National Dance Off, Putzie is giving Jan a piggy-back next to the Principal. However, in the next scene, Putzie is giving Jan a piggy-back right next to Cha-Cha.

Continuity: During the dance off, Sandy and Danny are dancing in the center and everyone is watching them. Behind Sandy, Cha Cha walks out and puts her hands on her hips. Then, the camera does a close up of her doing this. So she actually walked out twice.

Continuity: On the first day of school during lunch, at one point Frenchie has out a small compact and is checking for food in her teeth. But when it cuts to a wider angle, suddenly the compact is gone, and she's looking over her shoulder.

Continuity: During the sleepover, Rizzo gets off of the bed with a cigarette in one hand and the wine bottle in the other. In the next shot, the cigarette and the bottle have switched places.

Continuity: When Kenickie says to Rizzo in the soda parlour, "How about if I finish with you, huh?" there is a tomato ketchup squeezer on his side of the table. In the next scene when Rizzo says, "Finish this!" and throws the glass of cherry soda at Kenickie, the ketchup squeezer has moved to her side of the table, and in the next scene, when Kenickie is covered in soda, the ketchup squeezer is back in its normal position.

Continuity: When the three T-Birds go to moon at the TV camera at the National Dance Off, Doody says "1, 2, 3, go!" and pulls down his trousers to his ankles. In the next scene, his trousers are suddenly pulled right up to his buttocks.

Continuity: Rizzo is singing the Sandra-Dee song in Frenchie's bedroom. When she sits at the desk, you can just see that the chest of drawers are all closed fully behind her. However, later in the song Rizzo jumps off the bed. As she passes, then sits back at the desk, the second drawer down is now partially open. No one goes near it during this time, as all the girls in this song are on the bed.

Continuity: The scene where Sandy and Danny are eating together, then the rest of the gang comes, Sonny walks Marty home. Right after the two leave, Sonny come up behind Frenchie, like he was in the bathroom or at the jukebox. Wasn't he walking Marty home?

Continuity: When the waitress is cleaning off the table after the kids leave, the plates on her tray all appear to be empty. But Danny's and Sandy's plates are completely full when they leave, and no one touches their food. Kenickie takes one bite of a burger on a different plate, but not nearly enough to empty it.