Bret Ludwig

ßill L. W. ------ III wrote:
> You can bet propane will follow other petroleum products as supply
> dictate the price. San Diego has had an new home moratorium on natural
> gas for over twenty years as our supply dwindles, so many of the three
> thousand homes that burned in our last fire had propane missiles.
> Propane had a surprising higher BTU, and an octane of a hundred and
> thirty, while it last.


Actually it's methane (CNG,LNG) that has 130 octane rating. Propane is
only 106-108 depending on which test engine is used. (Actually ALL
octane ratings depend on which test engine is used, but that's a
diffferent issue.)

However, methane is condensible only at cryogenic temperatures.
Propane is a low pressure condensible.

Propane is the simplest fuel system and the cleanest, easiest to use,
best motor fuel we may buy. Unfortunately, there's just so much of it a
barrel of crude will fractionate off. CNG has no range and requires
scuba-class pressure tanks. LNG requires a cryotank and complex valving
and high dollar gas condensing plants.