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Whats the difference in shock oil between 15wt 30wt 40wt 80wt..

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  • 10-04-2006 1:30pm
    #1
    AndyPipkin2007
    Closed Accounts Posts: 53 ✭✭


    Whats the difference in shock oil between 15wt 30wt 40wt 80wt.. i wanted to buy some shock oil on ebay.. but there were lots of different types... what shall i go for, i think is it the weight of the oil?? i will be using the monster truck on rough ground, sort of grass , like a field.. but then again i might be using it on flat ground, can i just change the oil before using the truck?


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    #2
    AndyPipkin2007
    Closed Accounts Posts: 53 ✭✭AndyPipkin2007


    its for a nitro monster truck by the way


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    #3
    T-Maxx
    Registered Users Posts: 3,139 ✭✭✭T-Maxx


    The "weight" of shock oil refers to its viscosity. In layman's terms, 30wt is twice as thick as 15wt, etc.

    You'll have to experience with different weights to find the right one for you, it depends on the type, weight and setup of your truck, as well as where and how you drive/jump it.

    (The stock T-Maxx comes with approx. 30wt.)


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    #4
    AndyPipkin2007
    Closed Accounts Posts: 53 ✭✭AndyPipkin2007


    Thanks t-maxx, your one of the only people who would help..lol.

    I will start of with buying 30wt, and try around.! thanks again


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    #5
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    I have a full bottle of trinity 30w shock oil. Send us a pm if your intreasted.


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    #6
    vectra
    Registered Users Posts: 15,515 ✭✭✭✭vectra


    T-Maxx wrote:
    The stock T-Maxx comes with approx. 30wt.

    I wonder what is the stock oil in the Revo ?
    I have some 40 and 45 here I might try in the rear shocks as it seems to "sit down" more at the back.


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    #7
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    vectra wrote:
    I wonder what is the stock oil in the Revo ?
    The same as the t-maxx, I think all traxxas stuff are 30w.


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    #8
    coolwings
    Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    I suppose you are aware ...... a litre of SAE 30 motor oil (from the local filling station) is viscosity "30", likewise 40 and 45 grade motor oil are 40 and 45.

    You probably have a litre of what you need in your garden shed right now !

    I used to use fishing multiplier reel oil for (thin) - sewing machine oil for (slightly less thin) - after run oil (for medium) - three in one (for slightly thicker) - Castrol GTX for medium high viscosity, and high-vis lube oil (for highly viscous.)

    Now I just seem to use either after run oil or Castrol GTX

    Norman


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    #9
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    The oil for the shocks are 100% silicone there suposed to be better for the shocks. Motor oil can be used for air filter oil according to traxxas. That engine oil might be a bit hard for the shocks.


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    #10
    coolwings
    Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    You can experiment with allowing a small amount of air in each damper until you get the effect you require.
    I would expect however that the more you are doing extremely big jumps - the more the textbook approach is necessary.


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    #11
    coolwings
    Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    Plug wrote:
    The oil for the shocks are 100% silicone there suposed to be better for the shocks. Motor oil can be used for air filter oil according to traxxas. That engine oil might be a bit hard for the shocks.
    There is a second point in what you say there ....
    Mineral oil vs silicone
    A mineral oil would be harder on plastic shock parts over time, and the silicone substitute would be kinder on those parts.
    Dunno how long it would take to see the difference tho.
    I just use the most easily accessible ones (of a suitable thickness) nowadays and for the past 2 years the after-run and GTX have done the lot for me...


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    #12
    dmcracing
    Closed Accounts Posts: 11 ✭dmcracing


    Hi lads,If anyone needs proper silicone shock oil.All grades stocked 10wt-120wt.Send a mail.Can post anywhere.


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    #13
    vectra
    Registered Users Posts: 15,515 ✭✭✭✭vectra


    dmcracing wrote:
    Hi lads,If anyone needs proper silicone shock oil.All grades stocked 10wt-120wt.Send a mail.Can post anywhere.


    Sent you a private message ;)


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    #14
    vectra
    Registered Users Posts: 15,515 ✭✭✭✭vectra


    Changed my rear shock oil to 45 today. aint got out to try it yet but hoping to over the next few days if it stays dry :mad:


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    #15
    g5hn710m4xpdwy
    Closed Accounts Posts: 1,763 ✭✭✭g5hn710m4xpdwy


    dmracing - are you charging for the silcone oil?
    and
    how do people change the oil!?!


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    #16
    T-Maxx
    Registered Users Posts: 3,139 ✭✭✭T-Maxx


    Flunked wrote:
    dmracing - are you charging for the silcone oil?

    Yeah, I'd like to know as well!
    Flunked wrote:
    how do people change the oil!?!

    1. Take the shock cap off*
    2. Empty old oil
    3. Work shock up and down to rid all old oil
    4. Rinse with denatured alcohol
    5. Fill to manufacturer's specification

    *(You could also take the complete shock apart to check for wear and tear on o-rings/bladders/shafts/etc. )


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    #17
    g5hn710m4xpdwy
    Closed Accounts Posts: 1,763 ✭✭✭g5hn710m4xpdwy


    okey dokey thanks for that


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    #18
    BFassassin
    Registered Users Posts: 2,149 ✭✭✭BFassassin


    dmc racing hasnt been on in a while he must have forgot about us im waiting for him to reply to a pm


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    #19
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    I have a bottle of 30w shock oil in the gaff. Send us a pm if your looking for some.


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    #20
    g5hn710m4xpdwy
    Closed Accounts Posts: 1,763 ✭✭✭g5hn710m4xpdwy


    lol i love the word gaf....;)


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    #21
    vectra
    Registered Users Posts: 15,515 ✭✭✭✭vectra


    BFassassin wrote:
    dmc racing hasnt been on in a while he must have forgot about us im waiting for him to reply to a pm

    He never forgets.
    BUT
    he is a busy Buchall {spelling}:D
    and he will be back (as Arnie said)


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    #22
    crashman
    Closed Accounts Posts: 1 ✭crashman


    coolwings wrote:
    I suppose you are aware ...... a litre of SAE 30 motor oil (from the local filling station) is viscosity "30", likewise 40 and 45 grade motor oil are 40 and 45.

    You probably have a litre of what you need in your garden shed right now !

    I used to use fishing multiplier reel oil for (thin) - sewing machine oil for (slightly less thin) - after run oil (for medium) - three in one (for slightly thicker) - Castrol GTX for medium high viscosity, and high-vis lube oil (for highly viscous.)

    Now I just seem to use either after run oil or Castrol GTX

    Norman


    Motor oils are petroleum based and anything petrol based will swell rubber seals/bladders etc. You will find your shocks may leak prematurely, needing to be rebuilt more often. Stick with silicon based oils and you will be able to swap viscosities several times between rebuilds.

    Steve


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    #23
    coolwings
    Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    crashman wrote:
    Motor oils are petroleum based and anything petrol based will swell rubber seals/bladders etc. You will find your shocks may leak prematurely, needing to be rebuilt more often.
    I can say that I have not noticed any swelling, but the parts are a nylon type plastic, not rubber. I suspect the constant loss of plastisizer from the shock cylinders has speeded up, or to put it another way, the plastic is aging at a faster rate than usual. I'm not sure the difference is all that significant, given the (shortish) lifespan of a model car. eg I haven't broken one yet. But then I'm not racing every day.
    crashman wrote:
    Stick with silicon based oils and you will be able to swap viscosities several times between rebuilds.Steve
    I agree that silicon oils affect the plastic parts less. So shock oils will not accellerate aging. They are also cleaner if a leak appears. I have never actually had a leak, but I've spilled some while filling the shock piston cylinders ! .
    Of course the silicon oils are bad for your silicone parts in the car, eg fuel tubing, airfilter components, etc. Nobody seems to be aware of that.
    So it's a tradeoff.
    My real reason for using auto oils of similar viscosity, was convenience- available on the bench ... cheap ... does the job). At the time I didn't have any silicone shock oils handy. Since then we got shock oils for modellers in. But in my own vehicles, I have used auto oil still with no problems now for five years.


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