Ethanol in petrol.

  1. edwin Enthusiast

    Messages:
    62
    Location:
    Lichfield
    Gentlemen. I am becoming aware that ethanol in petrol "absorbs" water condensation in the petrol tank, and then when the car is left standing during winter lay off, the water can be released and it sinks to the bottom of the tank where it corrodes the tank. I have been looking at solutions to this, and found that ESSO super unleaded 97 octane is ethanol free, and therefore obviously higher octane, but no ethanol problems.
    Does anyone know of any other ethanol free petrol. Is anyone using an anti ethanol additive?

    Any comments on the matter would be most helpful. Edwin
     
    Richnd1974 likes this.
  2. mojobaby

    mojobaby Enthusiast

    Messages:
    1,027
    Location:
    Lot et Garonne France
    Hi Edwin, our cars are not meant to use ethanol. You're right about the water, it can cause a lot of damage within the engine as well. It separates the water from the fuel.

    We have 95 or 98 unleaded where I live in the south of France, but further North E10 fuel is available as well.. (might be E15, I can't remember which)

    I was about to say, "if you have a choice, then use 97 Unleaded" , but that's also incorrect. Ethanol should be avoided completely, there is no choice to be made.
    Don't know what's going to happen in the future. Ethanol is less polluting and that's why it's being pushed.
     
  3. edwin Enthusiast

    Messages:
    62
    Location:
    Lichfield
    Thanks for the reply. I keep my car in Martel, just south of Brive. They have 95 and 97 octane there, and then we have the bio stuff on the route to the tunnel. I am trying to understand the exact situation, and then get the right additive, here in the UK, and take it over with me next trip. I have a pal in the petrol business and he is researching this for me so i hope to post my findings for everyones benefit. I have a 1966 MGB as well, but it had an SS tank so not affected. It may be that I get an ss tank for the R4 as well. Regards
     
  4. retrospecparts Enthusiast

    Messages:
    88
    Location:
    West Sussex
    Although a stainless steel tank won't corrode, the water will still accumulate at the bottom of the tank, where the pick-up will suck it up and cause running problems.
    Also, it's not just the fuel tank that ethanol adversely affects. It can eat fuel hoses and internal components of the carburettor and fuel pump.
     
    mojobaby likes this.
  5. edwin Enthusiast

    Messages:
    62
    Location:
    Lichfield
    I lived in Canada in the 80's, and there you added Ethanol to the petrol so that it absorbed water condensation, which then passed through the fuel line under the car without freezing, and burned in the combustion process. In the winter at -40 you were more interested in the car working, so water in the tank meant possible water freezing in the exposed fuel line under the car, blocking the fuel line, and the motor stopping unexpectedly and being stranded.
     
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