[racprops]

Now for those that question how much power is in the gasoline vapor:
When you burn gasoline under ideal conditions, with plenty of oxygen, you get carbon dioxide (from the carbon atoms in gasoline), water (from the hydrogen atoms) and lots of heat. A gallon of gasoline contains about 132x106 joules of energy, which is equivalent to 125,000 BTU or 36,650 watt-hours:

If you took a 1,500-watt space heater and left it on full blast for a full 24-hour day, that's about how much heat is in a gallon of gas.
If it were possible for human beings to digest gasoline, a gallon would contain about 31,000 food calories -- the energy in a gallon of gasoline is equivalent to the energy in about 110 McDonalds hamburgers!

NOTE they are talking about the total power from fully burning gasoline...it is said our ICEs are only 30% efferent..so it seems we waste 70% some where..some in internal friction, some in pumping loses, but I still think that is only about 20% so there is 50% still wasted in incomplete use of the fuel in
ONLY making power.

Rich