Xbee is a liquid improvement agent for all fossil fuels, commonly referred to as a fuel additive. It is the fruit of many years of research carried out in Japan by Pr. Shinji Makino, combining  biotechnology and enzyme extracts from tree leaves and sea algae. These enzymes are the most powerful catalysts that can be found in nature.
Xbee is not a chemical product and therefore cannot damage the motors and other mechanical components.
Xbee equals less water, less mold and mildew and less bacteria in your fuel. That means less deposits and less  fouling of your motor parts.