We used to add the a quart of tranny fluid to the gas tank with fillups when running in the high plains desert. It increased the vapor izing point of gas and prevented vapor lock in the old dodge vans we were using. Worked like a charm. The dodge boys claimed it would lubricate the engine too!
I'm always fearfull of miracle cures and quick fix solutions. But there are a few out there that have worked for me in the past.