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  1. #1

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    Gas/oil mixture for breakin

    I just received my new SPE 43cc motor, I plan to break it in on the plane, I am thinking 1 tank on the ground(24oz) and the rest in flight. The manuel shows the gas mixture to be 100 to 1 for break in and regular flight. Why in the world would you break a motor in with almost no oil?
    What is a good percentage for break-in?

    Thanks
    Wingspam

    If I make it look easy then your watching the wrong plane

  2. #2

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    RE: Gas/oil mixture for breakin

    Wow-I would'n run 100:1 ANYTIME-much less during breakin. 32:1 is what was recommended to me.

  3. #3
    JOHNS3D's Avatar
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    RE: Gas/oil mixture for breakin

    should be interesting to know why the MANUAL says that.
    OMP Extra 300 100cc - DLE111
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  4. #4
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    RE: Gas/oil mixture for breakin

    Get Pennzoil Aircooled run it ALL the time at 32:1, your motor will love you for it.[sm=thumbup.gif][sm=thumbup.gif]
    Rich Border AMA 77727
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  5. #5

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    RE: Gas/oil mixture for breakin

    tell it like it is soarrich
    smooth as silk!

  6. #6

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    RE: Gas/oil mixture for breakin

    For over 20 years I have used nothing but Amsoil mixed 80-1, 2 oz to a gallon, and have perfect results. Looper

  7. #7

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    RE: Gas/oil mixture for breakin

    Run down to the local hardware store and pick up a bottle of Stihl or Echo mineral based chainsaw oil. Mix at 32-1. Run the engine on the ground long enough to get it tuned and go fly. Burn 3 hours of gas and then switch oils and ratios if you want. SPE must like to handle a lot of customer returns. That's the only reason i can come up with for a 100-1 mix. Their engines aren't good enough to handle that. Then again, I don't know an engine that really is...
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.

  8. #8
    Nogyro's Avatar
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    RE: Gas/oil mixture for breakin


    ORIGINAL: Looper

    For over 20 years I have used nothing but Amsoil mixed 80-1, 2 oz to a gallon, and have perfect results. Looper
    2 oz. per gallon is not 80:1, it's 64:1....
    Frank

  9. #9
    Moderator w8ye's Avatar
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    RE: Gas/oil mixture for breakin

    If he has a Imperial gal gas can it is 80:1

    I use a Imperial Gal can to mix 20:1 for my Saito gas engine.

    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  10. #10
    Nogyro's Avatar
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    RE: Gas/oil mixture for breakin

    I was just going by what he said......

    For an Imperial gallon, that would be pretty close.
    Frank

  11. #11
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    RE: Gas/oil mixture for breakin

    I don't know how it is in TN but I went to the discount store and tried my best to find a US gallon gas can and they were all imperial cans with a 1 US Gal mark on them. It came in handy for the Saito FG-20.

    I have a two US gal can for my other engines that I use for 32:1 in.
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  12. #12
    Nogyro's Avatar
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    RE: Gas/oil mixture for breakin

    In Tn, we don't care what size the can is when mixing oil with the gas, we (I) go by what the pump says at the gas station. I've checked a couple of cans that were marked 1 gallon, 1.5 gallon etc. and they were really off. I just don't trust them.
    Frank

  13. #13
    Moderator w8ye's Avatar
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    RE: Gas/oil mixture for breakin

    I only trust the gas pump also
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  14. #14

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    RE: Gas/oil mixture for breakin

    Ya....if the pump says 1 gallon you pumped...it will never be on the + side or more that a actual gallon of gas. Anything over a gallon leans your oil to gas ratio! Capt,n[X(]
    Imagination is far more important than knowledge. Albert Einstein.

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  15. #15

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    RE: Gas/oil mixture for breakin

    T.O.M. - In the past you mentioned that Pennzoil 2-Cycle Air-Cooled was a good oil to use but not for break-in. Could you tell me why?
    I was planning to use it for both break-in and thereafter untill I saw your comment in another post.

    Thanks for your time...Brian

  16. #16

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    RE: Gas/oil mixture for breakin

    well i think if we acutal put any oil in the motor thsese RC motors are going to be happy. I have used various brands and for the past 4-5 years i have been with penszoil from break in. for me it so much easier to now just run this deal.
    smooth as silk!

  17. #17

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    RE: Gas/oil mixture for breakin

    Pennzoil is an excellent oil for general running, but there have been many instances where it's use during the break in indicated that it did not carry the early wear particulates up and out of the engine as well as some others. I don't like seeing scratched piston skirts after a break in when other products leave the piston skirt with a new condition appearance. Scratches on the skirts is where later deposites of anti wear additives will accumulate first if the engine is ever run hot enough to cook them out of the oil. That is a process that occurs at a lower temp using a mineral than it does with a good synthetic.

    Personally, I prefer the use of a better synthetic from start to finish with an engine, and there are hundreds of examples that have proven that to work the best. However, some feel they need to break an engine in faster so they prefer a mineral.
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.

  18. #18

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    RE: Gas/oil mixture for breakin

    Thanks for the information T.O.M., I appreciate it....Brian

  19. #19

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    RE: Gas/oil mixture for breakin

    Hmmm
    After reading my oil collection chart, MVVS advised me to prohibit Pennzoil and Amsoil, and any other oil that mixed leaner than 1:40. They were very clear about that.
    Pennzoil because it was Dino oil, Amsoil because it mixed too lean. The front seals need more oil. Without the seals, things could be well different.
    Pe, (www.mvvs.nl), MVVS, MOKImotor, RCexl, MTW, Xoar, Mejzlik.
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  20. #20

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    RE: Gas/oil mixture for breakin

    BTW,

    A 100-1 mix for a break in might do that break in process mighty fast. Sure hope it doesn't sieze in the process.
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.

  21. #21

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    RE: Gas/oil mixture for breakin

    I broke in my engine with about 1.5 gallons of lawnboy 32:1. Now im running 50:1 home depot special. Ive tried amsoil 80:1 and penzoil 40:1 and didn't notice any difference.

  22. #22
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    RE: Gas/oil mixture for breakin


    ORIGINAL: lowwpassjr

    I broke in my engine with about 1.5 gallons of lawnboy 32:1. Now im running 50:1 home depot special. Ive tried amsoil 80:1 and penzoil 40:1 and didn't notice any difference.
    use Belray, Stilh Ultra....really good oils.
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