Tungsten disulfide tribological characteristics
- Thread starter jurko
- Start date
Interesting article. Curious as to why more motor oils are not using the tungsten disulfide additive. Ed
Some do and I use them.
Vanderbilt's Vanlube W-324 additive package contains tungsten disulfide (WS2).
www.vanderbiltchemicals.com
Vanderbilt's Vanlube W-324 additive package contains tungsten disulfide (WS2).
Friction Reducers > VANLUBE® W-324 | Vanderbilt Chemicals, LLC
<strong>VANLUBE W-324</strong> is an organotungstate which is soluble in petroleum fuels and lubricants.
One more reason that I choose Ravenol:
"RAVENOL VollSynth Turbo VST SAE 5W-40 is a PAO (Polyalphaolefin) based, fully synthetic low friction motor oil with especially USVO® and proven CleanSynto® technology for passenger car petrol and diesel engines with and without turbo-charging and direct injection.
Due to the USVO® technology we achieve an extremely high viscosity stability. We avoid the disadvantages of polymeric viscosity improvers while taking advantage of them. This improves engine protection, performance, engine cleanliness and oil drain intervals. The USVO® technology makes it possible that the product has no shear losses during the entire change interval and is extremely stable to oxidation. This unique technology helps oil to be lubricated faster, thereby minimizing friction while keeping the engine clean and efficient.
RAVENOL VollSynth Turbo VST SAE 5W-40 utilizes the positive properties of tungsten to smooth the surface structure of the motor, reducing friction and wear, and significantly improving mechanical efficiency. RAVENOL VollSynth Turbo VST SAE 5W-40 minimizes friction, wear and fuel consumption with excellent cold start characteristics."
"RAVENOL VollSynth Turbo VST SAE 5W-40 is a PAO (Polyalphaolefin) based, fully synthetic low friction motor oil with especially USVO® and proven CleanSynto® technology for passenger car petrol and diesel engines with and without turbo-charging and direct injection.
Due to the USVO® technology we achieve an extremely high viscosity stability. We avoid the disadvantages of polymeric viscosity improvers while taking advantage of them. This improves engine protection, performance, engine cleanliness and oil drain intervals. The USVO® technology makes it possible that the product has no shear losses during the entire change interval and is extremely stable to oxidation. This unique technology helps oil to be lubricated faster, thereby minimizing friction while keeping the engine clean and efficient.
RAVENOL VollSynth Turbo VST SAE 5W-40 utilizes the positive properties of tungsten to smooth the surface structure of the motor, reducing friction and wear, and significantly improving mechanical efficiency. RAVENOL VollSynth Turbo VST SAE 5W-40 minimizes friction, wear and fuel consumption with excellent cold start characteristics."
Liqui Moly Molygen has it
hmm. four ball machine. the contact area starts as a point contact and progresses to get bigger until there's enough hydrodynamic lubrication. Higher viscosity oils have an advantage here as they need less surface area to carry the same load. they compared a 5w-30, 20w-50 and 20w-60 oil it seems.
ws2, mos2, graphite... they're pretty much all the same thing, colloidal suspensions of solid lubricants. Which parts in the engine would benefit and under which conditions?
Also, do the colloidal solids lower HTHS? afterall, they have very little shear resistance, that's how ther platelets work in reducing friction.
ws2, mos2, graphite... they're pretty much all the same thing, colloidal suspensions of solid lubricants. Which parts in the engine would benefit and under which conditions?
Also, do the colloidal solids lower HTHS? afterall, they have very little shear resistance, that's how ther platelets work in reducing friction.
I think Risline Nano Prime also had Ws2.
Waiting for that answer.
second to none.
vanlube is not a colloidal solid it is a soluble compound, ester I think not a typical solid dispersion.
I think the Rislone is a nickel compound from the VOA
similar fashion to moly-dtc, that is also soluble liquid.
i like the vst much, this can´t be just placebo.. unfortunately price jumped almost 2x....
But vanlube isn't what is being discussed in that paper or in the topic title.
yeah you are right did not fully read.
IMHO solids never stay in suspension as the oil ages and fall out.
IMHO solids never stay in suspension as the oil ages and fall out.
In response to an e-mail asking whether Liqui Moly Ceratec is compatible with oils like Ravenol 0W-20 DFE that contain tungsten as an anti-friction additive, a Liqui Moly application engineer by the name of Steffen Niemietz described Tungsten as an "already outdated anti-friction agent," and that it is not recommended to combine Ceratec (an HBN agent) to tungsten oils.
lol, they are promoting molygen products that actually have way more tungsten than moly.
(the soluble, "di-alkyl ammonium tungstate") not the grey dust of ws2.
anyway i like both.
maybe consider removing the name, wouldn't want him to get in trouble for giving his opinion that may be different than the marketing department's.
