1985 K100RS gearbox and differential moly additive.

mcmlcccvrs · May 25, 2020

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/collections/frontpage/products/molyslip-g-gear-oil-supplement

pglaves · May 25, 2020

mcmlcccvrs said:
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/collections/frontpage/products/molyslip-g-gear-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.

mcmlcccvrs · May 25, 2020

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

pglaves · May 25, 2020

mcmlcccvrs said:
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.

gregfeeler · Jun 21, 2020

PGlaves said:
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/additives/gear-oil-additive.html#product-media-modal)? This is the detailed product information sheet: https://pim.liqui-moly.de/pidoc/P000009/1040-Gear-OilAdditive-40.0-en.pdf.

pglaves · Jun 21, 2020

GREGFEELER said:
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/additives/gear-oil-additive.html#product-media-modal)? This is the detailed product information sheet: https://pim.liqui-moly.de/pidoc/P000009/1040-Gear-OilAdditive-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.

gregfeeler · Jun 21, 2020

PGlaves said:
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!

1985 K100RS gearbox and differential moly additive.

mcmlcccvrs

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pglaves

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mcmlcccvrs

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gregfeeler

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