There are many different ways to go about getting revenge by messing with cars. Cars tend to be very expensive investments no matter what shape they are in, and those who actually have nice cars tend to put a lot of pride into them. Therefore, they are very popular targets for pranks and revenge.
There are few things that you should know before embarking on this kind of revenge, however. One of the most important things to realize that in some jurisdictions the old “sugar in the tank” ruse can be interpreted as a crime. Make sure that you read up on the laws in your area before deciding to sweeten up your target’s gas tank a bit. A good way to get revenge on somebody without actually putting sugar in the tank is to pour a little bit of glue on the outside of the car dripping down from the tank, and then just put sugar on the outside the car. Any individual who understands that sugar will ruin an engine will not turn the engine on and end up getting it towed.
Another option is to consider putting mothballs in the tank of your targets car. Mothballs also corrode engines, and it is more of an unusual prank so the actual detecting of the balls will be much harder for a mechanic as compared to sugar. Not to mention, mothball damage can be pervasive; even if one infected part gets replaced, it is easy for the “poison” to spread.
Happy revenge, and remember to take plenty of time to think out your moves before you implement them!