Reply #11: Propane has the smell added to it, too

[jmowreader]

For some strange reason I'm not completely aware of (probably because of the different chemical reactions that go on when you burn the two gases--natural gas creates one molecule of CO2 plus two of water when reacted in the presence of enough air, and propane creates three CO2 plus four H2O, once again if you've got enough air. So what? Every CO2 that's created, and every H2O that's created, creates heat when it happens--and the reason you're burning the gas in the first place is to get heat!) propane will give you more power than natural gas.

I know this because we sell these propane/natural gas powered generators that list their output as 15,000w if run on propane or 12,000w if run on natural gas.

In reality if you want to get rid of the CO production that REALLY happens when you react methane or propane with oxygen, you need to put a turbocharger on the engine. If you blow in an abundance of air, you get nice clean reactions without a lot of CO.