Ashless VS Low ash oils in HT bicycle engines

Discussion in 'Motorized Bicycle General Discussion' started by RLorange, Nov 5, 2008.

  1. RLorange

    RLorange New Member

    Joined:
    Jun 21, 2008
    Messages:
    127
    Likes Received:
    0
    I understand there is a difference between "Ashless" and "low ash" 2-stroke oils depending on the type of detergent used.

    Does anybody know which type is specified for the HT engines?

    Seems to me that with the low RPMs and poor tuning an ashless type would be best for a minimum of deposit build up. Is this correct?

    What brands or types of oil are ashless?

    I am considering running a mix of racing castor 20% and ashless regular oil 80% any recommendations?

    Are Outboard engine type oils ashless? incidently why does it say to not use these oils in other engines?
     
  2. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    Re: Ashless VS Low ash oils in HT engines

    Outboard run at a most constant, heavier load than other two strokes and are water cooled.

    Don't use outboard oil in your China engine....do use any good synthetic or dino oil at 24/1 or 32/1.
     
  3. Pablo

    Pablo Master Bike Builder & Forum Sponsor

    Joined:
    Dec 28, 2007
    Messages:
    3,658
    Likes Received:
    5
    Re: Ashless VS Low ash oils in HT engines

    These engines don't need an ashless oil. They can run pretty hot and are not very "precise".

    You can mix castor oil with a variety of oils, but keep the percentage down and use the fuel right away when you mix it. Castor premix, especially if the fuel has any EtOH at all, won't store at all.
     
  4. Nomad

    Nomad New Member

    Joined:
    Aug 4, 2008
    Messages:
    188
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines

    Where can I buy castor oil for mixing?....
     
  5. RLorange

    RLorange New Member

    Joined:
    Jun 21, 2008
    Messages:
    127
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines

    Thanks for the tip :)

    I am currently using a mix of Motul 800 70% and Castrol r30 Castor racing oil. I tested the oil mix together for a reaction but it was fine and mixed with fuel also fine and with no separation after a week. The Castor definitely Keeps the engine cool and the power is high and consistent even after a long ride on a hot day. The build up on the cylinder head is annoying tho I am chipping it off every couple of weeks!! Luckily this residue only seems to build up where there is fire.

    I am soon going to try a product called bi-Tron XL2 which is a 2-stroke specific additive and claims to be 100% petroleum oil based which has been treated to make the oil molecules polar so they stick to and penetrate metal. Sound to me like the ultimate solution and maybe a little too good to be true. The YouTube friction test clips sold me everyone should check it out.

    Will report on Bi-tron soon but it might make Castor obsolete :)
     
  6. Pablo

    Pablo Master Bike Builder & Forum Sponsor

    Joined:
    Dec 28, 2007
    Messages:
    3,658
    Likes Received:
    5
  7. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    Re: Ashless VS Low ash oils in HT engines

    That stuff is delish!
     
  8. ibcnya

    ibcnya New Member

    Joined:
    Oct 29, 2008
    Messages:
    220
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines


    I do wish i had known this 3 days ago. Could this be the source of muffler dripping oil, black carbon around tip, and hard to start sometimes, and lots of blue smoke on start up?
     
  9. jasonh

    jasonh New Member

    Joined:
    Jun 23, 2008
    Messages:
    1,590
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines

    That sounds like too much oil in the gas, plus too much fuel going into the motor to me. But definitely don't use the outboard stuff.
     
  10. ibcnya

    ibcnya New Member

    Joined:
    Oct 29, 2008
    Messages:
    220
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines

    Checked my needle position in my carb today and it was on the bottom slot, Moved it to the second to top position and throttle isnt boggy now like it was before. Rode about a mile, checked the plug after cool down and can tell its better.
     
  11. Mr.2Tcycles

    Mr.2Tcycles New Member

    Joined:
    Nov 13, 2008
    Messages:
    44
    Likes Received:
    0
    Re: Ashless VS Low ash oils in HT engines

    I use Maxima 927 Castor its 20% castor oil with the balance being synthetic and additives, using 25:1 after first gallon. No pipe drool and engine runs smooth, plug is nice and tan. Smells great too.IMHO
     

Share This Page