paulHarkonen t1_j1hxkvz wrote
Reply to comment by genericTerry in How does the non-CO2 emissions of an external combustion engine compare to an internal combustion engine? by Past_Self_4845
Not to anywhere close to the same degree. Excess fuel consumption is way more costly than heating up a little bit of extra air.
Obviously you want to run as close to stoichiometric as possible, but since we are only human, running a bit lean is less expensive than running a bit rich (all other factors being equal).
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