Using MoS2 grease on sleeve bearings for longevity?

Under heat and pressure Moly forms a tenacious barrier capable of 500,000psi. Thats one of the reasons it performs so well in slow moving exreme pressure applications. In high speed applications, Moly has one of the lowest coefficient of friction readings known. It will work very well in high rpm applications as long as the grease its in is designed for high rpm applications.

Thanks for answering. This is a lithium grease containing mineral oil and is rated up to 280000 mm/min. The viscosity is 155 cSt.
My fan's sleeve bearing doesn't have DN value more than 20000 mm/min, so it should be safe on that side.

My only concern was if MoS2 layer itself is accommodated for high speed (because the grease packaging suggests it should be used for slow moving parts).

One more thing. I read that once you apply Moly grease, you shouldn't go back to any other lubricant since MoS2 particles wear off the metal to an extent. Do you support that theory?

No...Moly only layers to 29 "slippage plains". At 29 layers it is still smaller than a human hair. It will not affect any tolerances.

It is true that if you stop using a Moly grease, the Moly will begin to wear off over time. However, not being able to stop using grease with Moly is not true. The only compatibility issue would be with the thickening agents used for the grease.

Another thing you will hear is Moly will seal corrosives underneath that lead to oxidation. I've ecountered this one a number of times. While years ago there were cheap Moly fortified greases that used raw Moly ore, most manfacturers today use MoS2. Sulfur is an exceptional anti-oxident and will prevent any rusting.

Thank you for the information. I am currently experimenting with different lubricants and I'm interested in longevity. I guess I should focus on synthetic grease types, in the future. Mineral oil in "CRC Super LT grease" won't last as long as synthetic oil.

Not necessarily...The answer to "will this work?" is always going to be...It depends. Synthetic greases will give you a distinct advantage in extreme temps. It doesn't sound as if temperature is much of a factor in this application. I would focus more on the thickening agent. I'm not a fan of Lithium Complex greases, evaluate a polyurea or aluminum complex base.