Hey, Pajama and DarkCreep,
In summers where I am it helps to do fill ups the 1st thing morning only when the fuel is most cool.
You both live in very hot climates, try it a couple/three fill ups...

 

I use 0% ethanol gas most of the time and I looked hard for mpg gas savings, 'cuz I knew they had to be there!
Alas, I couldn't find any difference ... glad you did.

 

Some states or regions require ethanol in the gas. At the same time, the labeling laws are not real consistant. You may find a pump that doesn't have a sticker saying "ethanol" but that doesn't always mean the fuel has zero ethanol.