Octane (and whatever other hydrocarbons in gasoline) does not burn clean??
“Octane (and whatever other hydrocarbons in gasoline) does not burn clean??”
Correct. Based on my experience in the Emission Control field, you get HC and CO by burning gasoline (cannot be avoided), so not just CO2 and water. The catalytic converter, however, cleans up nearly all of the HC and CO.