Someone asked for the relative energies of natural gas compared to
Gasoline. What I've been able to gather is :
1 cu/ft NG=1028 BTU
1 gal Gasoline=125000 BTU
C. Smith

Those are "sit and burn" BTUs.

In actuality, the efficiency of gasoline as a motor fuel is very low,
while the efficiency of natural gas is very high.  Otherwise, a NG or
propane-fueled car would have pretty much no range or power.  There are
gas-powered Crown Vics in service as police cruisers!

Gasoline must be stable as a liquid, then rapidly broken down and
vaporized before it will burn, so most of a gallon of gas provides no
power.  Natural gas must simply be heated, and a far higher percentage
burns.

Keith W

Well there is still the high BTU per cubic foot of gasoline.
The tank needed for NG is also big and heavy.

Paul Lamar

Keith
you state: "... so most of a gallon of gas provides no power."

If 100 % of the fuel burns the end product is just CO2 and H2O.
As not all fuel burns (mainly due to wall quenching) we have some traces
of CO and HC, not considering other compounds as these are not in
question here.
But the amounts of CO and HC are very small. They are limited by the
emission laws.
So one can safely say that for practical purposes all the fuel burns,
regardless if Gasoline, Diesel or Natural Gas is burned.

Won't you agree?

Rolf