Its an old racing car trick...........yes the cooler the gas the more dense it is..........pump up when it is coolest (usually between 4 to 6am)......

race cars used to put a dry ice cooler hidden in cars to run gas lines through to create a more dense gas mixture to increase horse power.......

but in your case the gas will "heat" up and expand in you tank as the day warms up and gives you some slight fuel advantage......

heres a simple one ive havent seen here yet: Make sure your gas cap is on tight, because thats 1 way gas can evaporate

wow!

Thank you for the very informative links!

Quick question though - do you notice any sort of power loss (or gain) with LPG?
How does it ride on the highway?

About a 10% lower performance. My vehicle has 225 hp,
so I don't really notice it. My wallet sure does notice though.

Have to pay to play, rent a Ducati if you want to push your throat into your stomach.

[edit on 8-9-2005 by Regenmacher]