One of the most common car myths is that putting sugar in a gas tank will ruin the engine. The belief is that the sugar combines with the gas to create a toffee-like substance, clogging the car's engine. This simply isn't true. The effect of sugar in a tank is similar to that of sand. Both substances can clog up filters, which isn't good for a car's engine, but won't disable the car immediately or completely.
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