As attractive as is the notion of continuously supplying cool gas to a pressure reducer beside the carb, it scares the hell out of me to consider my gas tank containing a substantial quantity of boiling gas after a couple hours of driving. An MGTD gas tank sits on the back of the car in the sun.

I am not aware that here in California, buying ethanol-free gas is an option, attractive as it is.

An old friend has suggested an un-named gasoline additive as a solution to low boiling point issues. Anyone know an additive that does this?

Various youtube posts demonstrate that ethanol-gasoline mixes can start to boil at as low as 110 degrees.