Re: need quick answer"sugar in gas tank"
Beernutz is right: since sugar will not dissolve in gasoline, it will absolutely not harm an engine (but it will plug up a fuel filter if it gets that far, just as will any other solid substance). <br /><br />Years ago, I attented a school for auto claims adjustors and the sugar in the gas tank myth was part of the curriculum. We poured some sugar in a jar of gasoline, and 3 weeks later, it still had not dissolved. Further, one of the instructors took the air cleaner off a new car and poured sugar into the carb. Clouds of black smoke poured out of the exhaust (this was pre-catalitic converter days) until finally enough was poured in to stop the engine. After several other indignities were performed on that car, the engine was torn down. Other than excessive carbon on the spark plugs, there was no, that's NO, damage to the pistons, the rods, the wrist pins or the ring grooves, or any other part of the engine.
<br /><br />This is supposed to be a forum for knowledgeable people to help, not pass on old wives' tales from their childhood.. 
Beernutz is right: since sugar will not dissolve in gasoline, it will absolutely not harm an engine (but it will plug up a fuel filter if it gets that far, just as will any other solid substance). <br /><br />Years ago, I attented a school for auto claims adjustors and the sugar in the gas tank myth was part of the curriculum. We poured some sugar in a jar of gasoline, and 3 weeks later, it still had not dissolved. Further, one of the instructors took the air cleaner off a new car and poured sugar into the carb. Clouds of black smoke poured out of the exhaust (this was pre-catalitic converter days) until finally enough was poured in to stop the engine. After several other indignities were performed on that car, the engine was torn down. Other than excessive carbon on the spark plugs, there was no, that's NO, damage to the pistons, the rods, the wrist pins or the ring grooves, or any other part of the engine.