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From what I understand, E-15 will replace E-10 in a couple of years leaving us with only E-15 and E-85 to choose from. There will be some rare exceptions that will offer Ethanol-free gas but, it will be even more expensive than it is now. In my area, 87 octane Ethanol-Free gas is about $1.20 more per gallon than 87 octane E-10. Ive been slowly preparing my car for the inevitable. Here are some things I have done to be able to run on Ethanol. Ive replaced all rubber fuel hoses with Gates Barricade carburetor hoses. Be careful buying this stuff because it comes in several varieties. What you want is the one stamped Carb- not for fuel injection. Next, I am using a brass carburetor float and fuel level sending unit float. Ethanol eats anything else. E-10 causes your engine to run lean. The main jet should be enlarged between 3-4%. With E-15, it will be even leaner and you'll probably need to richen the mixture even more. I went from a stock 69 main jet to a 72 and it made a night and day difference in the way my car runs. Bases that I do not have covered yet are the fuel pump and carburetor gaskets. To my knowledge no one makes a mechanical fuel pump diaphragm, accelerator pump, or power valve/spark valve that is Ethanol resistant yet . I am hoping that the use of a good Ethanol protection additive will keep those parts working. I use Ethanol Shield that can be bought everywhere, including Walmart for about $5.00 for 4 oz bottle. A bottle will treat 40 gallons of fuel.
Things will probably get interesting in the next few years. Probably a good idea to keep a fire extinguisher handy "just in case". As a disclosure, I am not an expert on Ethanol. I was an ASE Master Tech for several years and also Certified factory trained Mercedes-Benz technician and technical advisor for several years and have worked on cars off and on for over 40 years. Most of this Ethanol stuff has been learned by reading everything I can find about it. I would love to hear what you have done to prepare your car for Ethanol. This is affecting all of us and will only get worse in the future.
Things will probably get interesting in the next few years. Probably a good idea to keep a fire extinguisher handy "just in case". As a disclosure, I am not an expert on Ethanol. I was an ASE Master Tech for several years and also Certified factory trained Mercedes-Benz technician and technical advisor for several years and have worked on cars off and on for over 40 years. Most of this Ethanol stuff has been learned by reading everything I can find about it. I would love to hear what you have done to prepare your car for Ethanol. This is affecting all of us and will only get worse in the future.