Next you see three photos of working spark plugs after K3 installation on the battery. It is clear how powerful the spark becomes. The plasm becomes more purple and the spark is much wider than usual. This way the fuel mixture burns completely which leads to an increasment in the torque and the fuel economy. The photographed spark plugs are regular plugs from Renault Megane Coach with a methane gas injection system /35% fuel economy + more torqye as a result/. The photo camera is Canon Power Shot SX 160 IS, the shot is taken in mode "auto" by a customer which uses the K3 fuel optimizer. For comparison look at the advertising photos of two of the most modern spark plugs/including iridium ones/ and see how the spark is smaller than the K3 optimized ones.