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According to the SAE papers, the 13B already has lower friction forces applied to it than a Normal Piston engine. One would wonder if applying these factors would further increase the lead on reducing internal friction of the engine.
Also, Mazda has done some major work on the Housings which I didn't know they did. Apparently the housings have measures beyond the Cr plating. They have a solid lubricant which helps eliminate wear as well as micro pores to help in oil retention.
Would ceramic coating the housing be beneficial? That is now up for debate in my mind.
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