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  1. #1

    Default Fuel storage / treatment

    My petrol usage varies a lot so sometimes it's not fresh, could be a few months old. Anyone using treatment additives to prevent problems? Best brand?

  2. #2
    Join Date
    Mar 2008
    Location
    England.
    Posts
    18,890

    Default Re: Fuel storage / treatment

    In my lawnmower I use Honda Pro fuel stabiliser.
    It’s about 8 for 250 ml, but it stops your jets clogging up.
    A bottle lasts for years.
    S.
    Men and fish are alike, they both get into trouble when they open their mouths.

  3. #3
    Join Date
    May 2006
    Location
    Central Scotland
    Posts
    29,907

    Default Re: Fuel storage / treatment

    I have never used anything,So am interested to hear folks answers.I tend to run my 2 stroke outboard carb dry when putting it away I also do this with the genny, strimmer and chainsaw(turn off the petrol) It has worked well for me for years.
    But I do know that modern petrols if left in the carb.tend to gum them up.

    Jim
    The Fishermans Friend is the Flirty Fly,Fickle Food for Fleeting Fish.

  4. #4
    Join Date
    Sep 2008
    Location
    Edinburgh
    Posts
    173

    Default Re: Fuel storage / treatment

    Likewise, I drain the carb and I haven't had any problems.However I did look into this recently and found the lifetime of modern petrol is measured in a few months. It contains ethanol which allows it to absorb water and readily oxidises to form impurities that cause gummy residues. I have no experience of additives but they seem to extend lifetime to some extent.

    An expensive option, although perhaps viable if usage is low, may be alkylated fuel which is free of these impurities and has a 3-5 year lifetime. Works out at about 4/litre though.

    I think going forward I will mix only what I think I'll need and any surplus unmixed will go in the car before it goes off.

  5. #5
    Join Date
    Aug 2012
    Location
    Halifax
    Posts
    3,630

    Default Re: Fuel storage / treatment

    Quote Originally Posted by colliedog View Post
    Likewise, I drain the carb and I haven't had any problems.However I did look into this recently and found the lifetime of modern petrol is measured in a few months. It contains ethanol which allows it to absorb water and readily oxidises to form impurities that cause gummy residues. I have no experience of additives but they seem to extend lifetime to some extent.

    An expensive option, although perhaps viable if usage is low, may be alkylated fuel which is free of these impurities and has a 3-5 year lifetime. Works out at about 4/litre though.

    I think going forward I will mix only what I think I'll need and any surplus unmixed will go in the car before it goes off.
    Good tip , I use Aspen fuel in my saws , they can stand for 6 months and will start instantly and rev flat out without bogging . The fuel is available as 2 and 4 T at the price you say 20/ 5 litres . Any engine I was going to store , I’d run it dry , then pop a litre of Aspen in it , start it up then store .

  6. #6

    Default Re: Fuel storage / treatment

    I use the Briggs and Stratton additive for a chainsaw, brushcutter, generator and lawnmower, no problem starting any of these after periods of inactivity. https://www.amazon.co.uk/Briggs-Stra...s%2C248&sr=8-2
    Musha rig um du rum da

  7. #7
    Join Date
    Sep 2008
    Location
    Edinburgh
    Posts
    173

    Default Re: Fuel storage / treatment

    Quote Originally Posted by haggstock View Post
    Good tip , I use Aspen fuel in my saws , they can stand for 6 months and will start instantly and rev flat out without bogging . The fuel is available as 2 and 4 T at the price you say 20/ 5 litres . Any engine I was going to store , I’d run it dry , then pop a litre of Aspen in it , start it up then store .
    That's the one I read about. The only caveat i saw was not to use their pre mixed 2 stroke fuel in outboard as it isn't a marine grade. Recommendation was to get the 4 stroke fuel and mix yourself.

  8. #8
    Join Date
    Aug 2012
    Location
    Halifax
    Posts
    3,630

    Default Re: Fuel storage / treatment

    The local saw shop has two glass jars , one with pump fuel and one with Aspen . Into each jar they have dropped those sort of expanded foam packaging bits that look like big bits of pasta . The pump fuel ones are dissolving into sticky goo , the Aspen ones are floating . Great stuff , apparently in Sweden you can’t mix your own 2 stroke . The synthetic stuff is also better for health , but the cost of using it in an outboard would be prohibitive. But it certainly gives confidence that long term storage wouldn’t gum up a carb or injector. I don’t use it in the brushcutter for financial reasons as I can use a gallon a week in summer but it gets a tank full before winter lay up .

  9. #9
    Join Date
    May 2006
    Location
    Central Scotland
    Posts
    29,907

    Default Re: Fuel storage / treatment

    Bit of a change of topic,as a firefighter.we found that when they changed to the new type opf fuel.that we had problems controlling fuel fires.It was hard to extinguish,probably bercause of the Ethanon.but at the time.the fuel companies.said nothing had changed.

    Jim
    The Fishermans Friend is the Flirty Fly,Fickle Food for Fleeting Fish.

  10. #10
    Join Date
    Mar 2008
    Location
    England.
    Posts
    18,890

    Default Re: Fuel storage / treatment

    Just ordered this, same as the Honda one but 2 less delivered.
    Briggs and Stratton Fuel Fit 250ml 992381 Additive Fresh to 3 Years Stabilizer 798256131028 | eBay
    S.

    - - - Updated - - -

    Quote Originally Posted by 3lbgrayling View Post
    Bit of a change of topic,as a firefighter.we found that when they changed to the new type opf fuel.that we had problems controlling fuel fires.It was hard to extinguish,probably bercause of the Ethanon.but at the time.the fuel companies.said nothing had changed.

    Jim
    15% Ethanol in modern petrol apparently Jim?
    S.
    Men and fish are alike, they both get into trouble when they open their mouths.

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