Continuity: There are red and white puffy paper decorations on each side of the door entering the gym for the dance-off. However, within a few seconds, the decorations on the left side completely disappear.

Continuity: When Danny is first shown at school, he is shown over Kinicki's shoulder speaking to a girl in a blue sweater. The immediate next shot, Danny is talking to a totally different girl in a purple sweater and a few other girls as well.

Continuity: In the scene where the whole gang meets at the diner, the waitress brings out Danny and Sandy's food, and you can see the drinks they have ordered are a dark pink colour. In the next shot that they appear, the drinks are a lot lighter shade, almost pale pink.

Continuity: In the Greased Lightning dance scene, look just in front of the last white desk on the right side during the dream car segment. One of the dancers knocks a tyre off a stand and it falls in front of the desk. A shot or two later, the tyre is back up on the stand.

Continuity: When Sonny enters the sports hall for the National Dance Off, he twangs Chisum's braces and walks towards the bandstand. Chisum is well away from the doorway at this point. However, in the next scene, Chisum is now standing near the doorway and Sonny is walking away from the bandstand.

Continuity: Widescreen version: When Vince Fontaine introduces Johnny Casino & The Gamblers at the National Bandstand, Blanche is seen walking off the stage. In the next scene, she is on the stage, dancing with the band.

Continuity: In the pre-credits sequence, when Danny and Sandy on walking on the beach, Danny is on the left and Sandy is on the right. However, in the next scene, when they kiss, they have suddenly changed positions.

Visible crew/equipment: During the dream car dance sequence, look at the many wires guiding the engine as it is lowered into the car with Danny riding on it. Also, notice the size of the white hook and chain. In the next shot, when the engine is in place and the chain is going up, it is a much smaller hook and the chain jumps around like a plastic prop.

Continuity: During the song Summer Lovin', Rizzo lies down on her side on a picnic bench and puts on sunglasses. In the next shot, when she kicks Sandy and another girl off the bench, the sunglasses are off. In the following shot, they are on again.

Continuity: In the scene before the Beauty School Drop Out song, the crowd in the diner manages to get their food, eat it and leave within five minutes of closing.  The shop couldn't empty that quickly with all those people there.

Continuity: In the song "There Are Worse Things I Could Do," between the lines "Out of spite or jealousy" and "I don't steal and I don't lie", Rizzo's hand jumps from the side of her book to the top of her book, near her face.

Continuity: At the dance when they do that partner dance down the middle of the gym, as the lines form Kenickie and Cha-Cha start dancing down it, then the next shot its another couple first down it, and then a couple of shots later Kenickie and Cha-Cha start going down the lines again.

Continuity: During the dance, there's one song where the guys stand in one line and the girls in another, and the couples take turns walking down the middle. In one shot, Danny is placing Sandy in line, and a couple (the woman has a blue dress on) is already starting down the middle. Then it cuts to another angle and no one is in the middle. Back to the first angle, and people are in the middle again.

Continuity: When Rizzo is lying on the bench, and kicks off Sandy and that other chick, Sandy is singing, however her mouth is not moving at all.

Continuity: Once during the dancing scene you can see Vince Fontaine standing on Marty's left side, and then suddenly on her right.

Audio problem: At the very beginning when they are singing "Summer Loving" Sandy sat at the top of the seating for the athletics track. The voice-over and Sandy's lip movements do not match.

Continuity: In the beginning animated sequence, when Rizzo takes off her top, the long neck in the mirror suddenly disappears altogether.

Continuity: During the cafeteria scene in the beginning, Patty comes along and Frenchy rests her head on her left hand with her elbow on the table. The shot changes after Rizzo says "It's the biggest thrill of my life" and Frenchy's head is instantly no longer resting on her hand, and her elbow is off the table.

Continuity: When Jan is mimicking the Ipana squirrel on TV, she put her hand up to her mouth when she is singing, 'Brush-a Brush-a Brush-a', and pretending to brush her teeth. In the second half of the song, however, after the second line; 'New Ipana toothpaste', she has both her arms pointing in front of her making a 45 degree angle with her body, and her neck straight but in the next shot, which is at the beginning of the next line, 'Brush-a Brush-a Brush-a', she has one hand up to her mouth again and her head is pointed a little to the right. You might also notice that the time between those two lines is longer than it should be.

Other: This mistake occurs during the dance sequence 'You're the One that I Want.' John Travolta and Olivia Newton-John have just emerged from a 'Shake Shack' and are now ascending a ramp. For the lyrics ,Hoo hoo hoo... honey,' the camera zooms in close to their faces. You can see that the dance move is for the two actors to bob their heads close to each other's so that they nearly touch. They do it right the first time, but the second time they visibly mess up. John Travolta seems to try to fix his mistake, but Olivia Newton-John appears to crack up and leave the frame.