Gasoline will only burn as a VAPOUR, with the right amount of air in the mix...

It is really quite fasinating...

Here are some references:
http://www.google.com/url?sa=U&start...ver.htm&e=7800
http://www.ccohs.ca/oshanswers/chemi...able/flam.html
http://www.brownoil.com/msdsgasoline3.htm
http://www.mapl.com/msds/msds/127mar019.html#5
This is a really good one... How to make a bomb...
http://www.ohscanada.com/virtual-iss...le/acprev.html


What it comes down to, is that Gasoline ONLY BURNS (under normal "room" temperatures/pressures) when it is in a vapour form, and it is in a concentration of between about 1.4% and 7.5% AND an ignition source is present. Any other concentration, and combustion simply does not happen.

So, If there is not enough air inside your gas tank, I will happily drop a match in!

gus