Interesting, i figured because our exhaust pipes have no kind of catalitinc converter and emission regulations that they would be much worse (to scale) than our conventional car engines. I am a little more curious as to the difference between methanal and gasoline. Lets say we have a 30cc glow and 30cc gas. What would have worse emissions. Also, does the longer flight times of gasoline dampen any differences.

I am not worried but thaught of it this morning and didn't really no the answer. Should be an interesting thread no less.