I would really like to know this

Don't know the answer

According to Mythbusters on Discovery network... nothing.

I guess the answer is how much, in what type of tank.

For one it makes it sweat.

Since there is no good reason to do it, why would you want to know.

Shavonepearson- For one thing it will mean a complete engin overhaul, or a new engine; BUT for the one that does it (puts the sugar in the tank) will mean some possible jail time ,plus the ciost of court and fines and also pay for the cost of one or the other on the engin:: MY advise is ( Don't DO IT!! ): F.B.E.