[ItBites]

jwd

You don't live in Phoenix. I suspect the reaction rate of breakdown of the fuel is, like most chemical reactions, strongly dependent on temperature (think activation energy). Your experience is likely affected by your local ambient conditions. Here in Phoenix, my garage is usually over 115degF during the day. As I recall, many chemical reactions double their rate for every 10degF of increase. Your friend being a chemist, working for one of the gasoline suppliers, may have a bias. I have heard many salesmen tell me everything is fine, but in reality, what we have now does not last as long as what we used to get. The fuel seller always say the next generation is better, just trust them. Hahaha. If you have not run comparative aging tests yourself, maybe you should. I have direct experience in Phoenix temperatures, not what I was told by someone else.