And they actually use less oxygen!
CH4 + 2 O2 = 2 H2O + CO2 2 C2H6 + 7 O2 = 6 H2O + 4 CO2 C3H8 + 5 O2 = 4 H2O + 3 CO2
Ooops! Thank you!
This is what happens when one chooses to NOT check his work!