fuel / gasoline
and only because it is a pet peeve of mine...
NOS either refers to a brand name by Edelbrock or if separated Nitrous Oxide System. NOS is not the nitrous oxide in the bottle. That would be N20, 2 parts nitrogen and 1 part oxygen. meaning a total of 3 molecules combined together to create the giggety go juice to make more power inside of the air pump we call an engine.
Old post, I know, but now ya know.