re: Is it smart to buy a car at 0% and no money down. Is there something I'm missing here?

I have done this several times. As others have mentioned, you will be upside down once you drive the car of off the lot. However, that should not be too much of a problem since you have the money that you would put down.

When I purchased my first car following 9/11, I was going to put $20k down. But they started offering 0% interest for 36 months. I decided to put nothing down and invest the $20k. But instead I left it in savings. About a year later, I wondered where most of the $20k went. The moral of the story is pay the down payment if you don’t have the discipline to save or invest the money.