In fact, there's a whole industry out there promoting the use of ethanol and methanol with engines that ran on gasoline. If you've never ventured outside the United States, the Brazilian automotive industry has been using ethanol blended gasolines of greater than 20% ethanol for decades.
I'm sorry you are unaware of these facts. Everything I posted can be cross-referenced, which is why I posted authoritative links in my post to help those unfamiliar with the subjects contained, to learn more. I wish to inform and educate, not pass along folklore, hearsay or what some salesman at a Toyota dealership says.
But if you dig into how it's possible for people to convert their gasoline powered vehicles to ethanol or methanol, there is nothing needed on the "engine" side. What is "beneficial" on the engine side has to do with higher compression pistons or moving towards boosted engine configurations, ones with altered ignition systems to take advantage of these two superior fuels. However, as I pointed out, there are things necessary to do on the "fuel system" side, which is what I clearly point out in the second paragraph of what I posted above.
@hlthe2b: I will follow what my dealership and my manual indicate. And yes, they point out just how corrosive E15 can be IF the engine is air-cooled and/or to valves, gaskets, rubber lines and rubber parts in general in those vehicles not designed for it. But, do I advise others here to listen to you and your interpretation, rather than their own dealership, owner's manual, car manufacturer and specifically Toyota and the warning given re: my warranty? Umm, no.
For those who don't know, E10 gasoline with ethanol does not damage air-cooled and/or to valves, gaskets, rubber lines and rubber parts in general in those vehicles warranted to use E10 gasoline. What you are mostly referring to in regards to gaskets, rubber lines and rubber parts, is primarily a function of gasoline hydrocarbon peroxides that form from hydrocarbon gasoline oxidation, as gasoline interacts with air, heat, and time.
What components of conventional hydrocarbon gasoline cause peroxides? The unstable hydrocarbons known as alkenes or better known as hydrocarbon olefins and di-olefins. These peroxides break down into organic acids and aldehydes that chemically attack the polymer chains in rubber.
Don't believe me?
(Gasoline) Oxidation inhibitors, including aromatic amines and hindered phenols, are also called antioxidants. They prevent gasoline components from reacting with oxygen in the air to form peroxides or gums.
Oxidation inhibitors are needed in virtually all gasolines, but especially in those with high olefin content. Peroxides can degrade antiknock quality, cause fuel pump wear, and attack plastic or elastomeric fuel system parts. Soluble gums can lead to engine deposits and insoluble gums can plug fuel filters.
Motor Gasolines Technical Review - Chevron Petroleum Corporation Pg 41.
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