no, simple and true thats a no, it will make it cut out because of the water, the sugar will simply settle in the bottom of the gas tank, they have already proven this false on myth busters, if you really want to ruin a car, bleach is the way to go, expecially in the transmission fluid. Note: i am not responsible in any way for any actions caused by you, your friends or anyone else.
(this information is readily avaliable through the internet, expecially some really nasty ways to destroy cars)