Great post Mr Tone,
Finnaly someone who understands at a working level that IC engines are gasses expansion engines. The heat in-cylinder made is to make the in-cylinder gases expansion. The fuel in-cylinder is to make the in-cylinder heat to make the all gases present expansion. And you actually only need the amount of oxygen molecules present to fully combust the in-cylinder used fuel blends. High carbons fuels need more oxygen molecules than low-carbon, high hydrogen fuels. The heat made is the same. Rate of heat energy made/released, and therefore expansion, does vary. From too slow, unable to harness/convert. To much too fast and pressure spiking destructive.
Ha! Ha! I really needed you here on the DOW, man 9 years ago:
You write much more compactly than me.
Best Regards
Steve Unruh