[naturalextraction]

Unless you have an externally driven atmosphere acquisition and compression system (yea, probably didn't need to say that), ie; turbo, belt driven supercharger and want to use water as an anti-detonate, it will not provide any mileage or combustion efficiency benefits. Yes it may clean up your exhausting gases to some degree, but can absorb a significant amount of the heat energy your engine needs in making the conversion to mechanical energy through the force on the piston that transfers that motion/energy to your crank. In effect making the transfer of chemically derived heat energy, in this case, less efficient. It will clean your piston tops nicely however. Also if not metered correctly, and granted it would take a lot of water, some have hydra-locked their engines (with ill advised/lacking appropriate information) with attempts at water injection. Make sure that what you hear or are reading regarding W.I. is from credible, tried and tested sources, preferably entities with real backing, labs, accredited authors etc. If your engine is naturally aspirated with F.I. or with old school carburetor (analog A/F metering device) then water injection is not for your power plant.