My son is ADDICTED! He watches the movie ALL the time...he tells me "That's a car like Danny Zuco..." I have the soundtrack, and he listens to it ALL THE TIME! He can sing some of the songs...he knows the words and all.
I have to admidt, it's REALLY cute

He even knows who Frankie Avalon is...he tells me "Frankie Avalon also sings Venus"
He knows who he is when the movie comes on, and he has to point it out to all of us. He walks around during the day singing the songs. He sing "Go greased lightning!" in the stores complete with hand movements.
Here's a little video of him doing the dance....it's kinda dark, but REALLY cute!

<a href="http://www.onetruemedia.com/shared?p=680bdb1fe427570f79a23f&skin_id=601&utm_so urce=otm&utm_medium=image" target="_blank"><img src="http://www.onetruemedia.com/cover_thumbnail?p=680bdb1fe427570f79a23f&view=2" border="0" alt="View this montage created at One True Media" title="View this montage created at One True Media"><br/>Greased Lightning</a>