I'm no expert but I will add this to the Mix. Comment as you see fit. But someone brought up the fact that there are different fuel for different regions. If thats so then one would need to know that when making a choice. Correct? http://www.straightdope.com/columns/041008.html

__________________
"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….