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Thread: 1985 K100RS gearbox and differential moly additive.

  1. #1

    1985 K100RS gearbox and differential moly additive.

    Just wondering if any of you guys put, or have put, anti-friction additives such as MolySlip into your gear box or differential, and what your thoughts might be regarding any potential benefits of using such a product?

    https://molyslip.myshopify.com/colle...oil-supplement

  2. #2
    Quote Originally Posted by mcmlcccvrs View Post
    Just wondering if any of you guys put, or have put, anti-friction additives such as MolySlip into your gear box or differential, and what your thoughts might be regarding any potential benefits of using such a product?

    https://molyslip.myshopify.com/colle...oil-supplement
    I started using Dow Corning Gear Guard in 1985 and have used it or an equivalent moly additive continuously in all gear boxes (that use a separate lubricant and not the engine oil) and final drives ever since. That accounts for almost 2 million miles of use in my bikes and my wife Voni's bikes.

    There are several suitable brands. For years I used Guard Dog Moly gear oil additive. They closed down business but TS Moly still sells the same formulation as TS-90 gear oil additive. Dupont sells what used to be the Dow Corning Molykote line of additives. These call for between 5% and 10% to be added to ordinary gear oil by volume. I assume the Molyslip additive you mentioned is similar. I did notice it is a Canadian product which for folks in Canada may be easier to obtain than some of the others.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  3. #3
    Yes, 5% to 10% of total volume. What have you been using percentage-wise, Paul?

  4. #4
    Quote Originally Posted by mcmlcccvrs View Post
    Yes, 5% to 10% of total volume. What have you been using percentage-wise, Paul?
    Some of the moly sticks around inside the transmission when you do an oil change. It is supposed to cling to metal, after all. So the first time I use it in a bike I use 10%. After that 5% or so is sufficient.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  5. #5
    Dances With Sheep GREGFEELER's Avatar
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    Quote Originally Posted by PGlaves View Post
    I started using Dow Corning Gear Guard in 1985 and have used it or an equivalent moly additive continuously in all gear boxes (that use a separate lubricant and not the engine oil) and final drives ever since. That accounts for almost 2 million miles of use in my bikes and my wife Voni's bikes.

    There are several suitable brands. For years I used Guard Dog Moly gear oil additive. They closed down business but TS Moly still sells the same formulation as TS-90 gear oil additive. Dupont sells what used to be the Dow Corning Molykote line of additives. These call for between 5% and 10% to be added to ordinary gear oil by volume. I assume the Molyslip additive you mentioned is similar. I did notice it is a Canadian product which for folks in Canada may be easier to obtain than some of the others.
    Paul,
    Given that TS-90 starts at about $50 for a quart, do you have an opinion about the "LiqiMoly MoS2 Anti-Friction for Gears" (https://products.liqui-moly.com/addi...-media-modal)? This is the detailed product information sheet: https://pim.liqui-moly.de/pidoc/P000...ve-40.0-en.pdf.
    Greg Feeler
    Ambassador & amateur K-Bike collector, it seems
    1972 R75/5, 1990 K75, 1990 K1, 1992 K75S, 2003 K1200RS

  6. #6
    Quote Originally Posted by GREGFEELER View Post
    Paul,
    Given that TS-90 starts at about $50 for a quart, do you have an opinion about the "LiqiMoly MoS2 Anti-Friction for Gears" (https://products.liqui-moly.com/addi...-media-modal)? This is the detailed product information sheet: https://pim.liqui-moly.de/pidoc/P000...ve-40.0-en.pdf.
    I think it is probably just fine for the described purpose. I tried to figure out the mixing ration but failed. Dow, TS Moly, and Guardog all describe(d) the mixing ratio as a percent by volume. Liquimoly specifies the mixing ratio as grams per liter and the density as 1 gram per milliliter. So at 20 ml per liter this is a 2% mixing ratio. Which means that it is either more concentrated or they recommend a lower dose.

    But - Liquimoly is a reputable company and their claims seem reasonable. So my verdict is that it is OK. I'm just glad I bought a gallon of Guard Dog additive just before Ben Mathes closed the company.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  7. #7
    Dances With Sheep GREGFEELER's Avatar
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    Quote Originally Posted by PGlaves View Post
    I think it is probably just fine for the described purpose. I tried to figure out the mixing ration but failed. Dow, TS Moly, and Guardog all describe(d) the mixing ratio as a percent by volume. Liquimoly specifies the mixing ratio as grams per liter and the density as 1 gram per milliliter. So at 20 ml per liter this is a 2% mixing ratio. Which means that it is either more concentrated or they recommend a lower dose.

    But - Liquimoly is a reputable company and their claims seem reasonable. So my verdict is that it is OK. I'm just glad I bought a gallon of Guard Dog additive just before Ben Mathes closed the company.
    I saw that strange mixing information as well and figured if I get some I will dump the entire tube into something that measures CCs and use that. If a 50 gram tube is X CC's and that is good for 2.5 liters of gear oil I would just do the math. They have an 800# on their web site so no harm in calling to ask about application levels. Thanks, Paul!
    Greg Feeler
    Ambassador & amateur K-Bike collector, it seems
    1972 R75/5, 1990 K75, 1990 K1, 1992 K75S, 2003 K1200RS

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