I dunno about you, but here it is blazin hot where I am right now. For the next few months..
Not just for Tacomas!
My question to you (Vote!!) is window(s) down, or a/c.. or maybe a combo of both during these hot drives. Or maybe you are one of those who refuses to conform, and just suffer with the windows up and no a/c..
Entirely regardless of the myths regarding window down=bad MPG.
Pretend that you will achieve the same MPG. Even if you don't believe that.
Personally, I have been keeping the window down.. Get to rest my hand on the door, and just makes it feel like summer. Relaxing for me. Unless it is rush hour, and traffic is at a standstill and no fresh air is coming in, in which case I'll roll the window up and blast that cold a/c!