Simca fuel...
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Thread: Simca fuel...

  1. #1
    Tadpole
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    Default Simca fuel...

    Any ideas whether a 1973 Simca 1100 can run on Super Unleaded as it is the same 97 octane rating as Four Star or whether you need to use additives, if the car hasn't had any kind of conversion?

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  2. #2
    1000+ Posts Gamma's Avatar
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    As the Octane rating is the same, the performance will be the similar.
    The head however, is not modified, (hardened seats etc) and therefore additives might be a good idea, (valvemaster or similar).
    I just noticed you are one of the UK members, so a check with the technical department of your chosen fuel supplier might not go astray to get the specs of the fuel. (i.e. do they already put in a lead replacement additive/valve set lubricant).
    /// 1986 SII 505 GTI
    2003 T5 307 HDI
    2013 LandRover90
    Sacred cows make the best hamburger mince.
    If you run, you only die tired

  3. #3
    Gone Fishin' Ray Bell's Avatar
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    I don't know about that, Gamma...

    LRP here was supposed to have that sort of additive, yet it was the very fuel which gave me the worst VSR.

  4. #4
    1000+ Posts Gamma's Avatar
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    Quote Originally Posted by Ray Bell
    I don't know about that, Gamma...

    LRP here was supposed to have that sort of additive, yet it was the very fuel which gave me the worst VSR.
    Yes, I found the same on a car I had at the time, (It ended up burning out a few of the exhaust valves).

    I ended up using an additive anyway along with an Octane booster, (said 97 was tested at only 94).
    /// 1986 SII 505 GTI
    2003 T5 307 HDI
    2013 LandRover90
    Sacred cows make the best hamburger mince.
    If you run, you only die tired

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