[naturalextraction]

Reading where, from what? What tests were they running? If you absorb heat energy that is needed to push your piston, how can you run less fuel and maintain usable power? You have whats called a drive-ability problem. Power drops immensely. Again with out expanding heat from the chemical energy, there is NO mechanical conversion of power/the expending energy called heat. Plain and Simple. The thought with water is still for anti-detonation. Leaner conditions can and will create pre-detonation. Especially with older analog systems, with water you CAN run leaner conditions by absorbing excess latent heat. (valves, piston tops, any carbon spot retaining heat) But you will have POOR performance at best. (and by poor, I mean hardly usable) Running 18:1 or leaner, without a turbo or any other forced air system, the results will be really poor power especially depending on the displacement and method of fuel delivery (management).