Quote Originally Posted by kevin7 View Post
I bet you guys put 93 octane in your Kia's and Hyundais too.

C4H10 is butane

C4H10 is butane, but when it is refined, it is never 100% pure. There is always contaminants in it. The amount of contaminants varies from brand to brand.

There is an allowable contaminant (H2S, H20, CO2, etc) amount when natural gas is processed.

Edit: and I do put 93 octane in my Neon...needs it though when I am pushing 20+psi.