2 Stroke question (petrol)




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  1. #1
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    Default 2 Stroke question (petrol)

    Years back, when returning from Mozambique fishing trips we would throw the remaining premixed boat fuel into the tow vehicles with no ill effect, the vehicles were a 4L Jeep Cherokee(I6) and a 3L Colt (V6)
    My question is, would this still be ok in a more modern(dual vvti) V6 like my 4L V6 if I threw in 20-30L to half a tank??

    Lets avoid the normal 2SO frenzi
    FJC - Just Cruising

  2. #2
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    Default Re: 2 Stroke question (petrol)

    My only worry would be if it clogs up the lambda sensors on modern vehicles.
    but I supose it really depends if it comes out at all as an unburnt oily substance or get burnt up completely. What mix ratio into the boat fuel? 1:50?
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  4. #3
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    Default Re: 2 Stroke question (petrol)

    Quote Originally Posted by Stephan van Tonder View Post
    My only worry would be if it clogs up the lambda sensors on modern vehicles.
    but I supose it really depends if it comes out at all as an unburnt oily substance or get burnt up completely. What mix ratio into the boat fuel? 1:50?
    On my boat 100:1 but some are 50:1
    FJC - Just Cruising

  5. #4
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    Default Re: 2 Stroke question (petrol)

    Spent three days over the weekend without power.

    We went through about 70L of petrol between the 1kw and 5.5kw generators. Both generators were working at about 50-60% of rated max load.

    Both generators are 4 stroke engines and air cooled.
    Both generators are carb fed.

    All the petrol was mixed at 1 part 2so JASO FC (Wm Penn) and 40 parts LRP from Shell.

    The spark plugs and exhausts are clean.

    I will try and pull one the plugs quickly for a picture.


    Edit : pic attached

    This spark plug has only ever seen the fuel ratio as mentioned above. We dont keep unmixed petrol on the farm.

    Last edited by MariusFourie; 2018/10/03 at 10:36 AM.

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  7. #5
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    Default Re: 2 Stroke question (petrol)

    Quote Originally Posted by MariusFourie View Post
    Spent three days over the weekend without power.

    We went through about 70L of petrol between the 1kw and 5.5kw generators. Both generators were working at about 50-60% of rated max load.

    Both generators are 4 stroke engines and air cooled.
    Both generators are carb fed.

    All the petrol was mixed at 1 part 2so JASO FC (Wm Penn) and 40 parts LRP from Shell.

    The spark plugs and exhausts are clean.

    I will try and pull one the plugs quickly for a picture.


    Edit : pic attached

    This spark plug has only ever seen the fuel ratio as mentioned above. We dont keep unmixed petrol on the farm.

    Thanks, I know it can be done on things like the Jeep and Mitsu as we did it without ill effects but my question is what about more modern engines, I doubt the generators have dual vvti and all the sensors etc...
    FJC - Just Cruising

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    Default Re: 2 Stroke question (petrol)

    Quote Originally Posted by dirtshark View Post
    Thanks, I know it can be done on things like the Jeep and Mitsu as we did it without ill effects but my question is what about more modern engines, I doubt the generators have dual vvti and all the sensors etc...
    I wouldn't risk it with an engine that has lambda/oxygen sensors TBH. Those sensors don't come cheap.

    Injectors, pump etc. won't mind at all. It's just exhaust sensors that worry me.

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  10. #7
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    Default Re: 2 Stroke question (petrol)

    Always dangerous territory these discussions.

    2So or any additive for that matter occasionally is fine.

    70l over a weekend in a generator is hardly going to show and damage or signs.

    Its a bit like drugs or alcohol. A bottle of Bells every few weeks is probably fine. A bottle every night for thirty years will show.
    Cheers

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  12. #8
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    Default Re: 2 Stroke question (petrol)

    So you’ll end up with a ratio of around 200:1...

    I wouldn’t worry about it

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  14. #9
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    Default Re: 2 Stroke question (petrol)

    Had a look at some two stroke oils recently and on one of the containers it stated "safe for catalysts"

    I think it was a Motul mineral based oil

  15. #10
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    Default Re: 2 Stroke question (petrol)

    Quote Originally Posted by SAND View Post
    So you’ll end up with a ratio of around 200:1...

    I wouldn’t worry about it
    probably less than the lubrication additives added by the fuel distributors
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