I heard a lot but never used any engine additives for protection and some fuel s

[kschachn]

Originally Posted by Anton_N
Now even serious organization have all information available on internet. I read topics from universities and institutions. What do you thinkcan we trust Shell or Mobil?

Funny and completely untrue. What company divulges proprietary trade secrets?

What they may divulge is performance test results. Again for these additives, where are those? Shell and ExxonMobil divulge performance results all the time. I know which ones meet API SN or have Porsche A40 approval for example. I know which ones are fuel-saving formulas. Which 3rd party additives publish test results to prove their claims?

Your post is only more irrelevant obfuscation and diversion.

 

[Garak]

Originally Posted by Anton_N
What do you thinkcan we trust Shell or Mobil?

Look at it this way. What do you think any automaker that relies on CAFE credits (they all do) would do and/or say if all the oil companies were intentionally withholding an almost free ingredient that would automatically give you 10-20% better fuel economy?

 

[MolaKule]

Originally Posted by Anton_N
I read topics from universities and institutions...



Can you provide us a list of those Universities, papers and authors? Maybe we can help you understand some of those papers.

 

[Anton_N]

Sure. Have a look at some links that I found on internet:

https://www.researchgate.net/public...anical_and_Wear_Properties_of_AZ31_Alloy

https://journals.sagepub.com/doi/pdf/10.1177/1687814018778188

https://link.springer.com/article/10.1007/s12239-017-0102-9

https://www.researchgate.net/public...on_nanomaterials_as_lubricants_modifiers

 

[MolaKule]

Originally Posted by Anton_N
Sure. Have a look at some links that I found on internet:

https://www.researchgate.net/public...anical_and_Wear_Properties_of_AZ31_Alloy


Not applicable to automotive drivelines.


Originally Posted by Anton_N
https://journals.sagepub.com/doi/pdf/10.1177/1687814018778188


The application here is for metalworking so not applicable to automotive drivelines.


https://link.springer.com/article/10.1007/s12239-017-0102-9

https://www.researchgate.net/public...on_nanomaterials_as_lubricants_modifiers[/quote]


Neither of the two above can accessed without a subscription or payment, but here are two main problems i have found with nano-carbon research thus far:

1) Agglomeration of carbon nanostructures without special dispersants can actually increase friction and load up filters. Agglomeration means that the nano-carbon structures group together to form larger particles, similar to soot.

2) In order to disperse these particles, conventional friction reduction chemistry must be used to disperse these particles to keep them from agglomerating.

From one of my Materials papers:

"...To exert the lubricating properties of graphene in a lubricant, the dispersibility of graphene in the lubricant must be considered. The dispersity of graphene in most lubricants is very poor [23]. Chemical modification is usually used to improve its dispersity. For instance, Lin et al. [24] reported that after chemical modification by stearic acid and oleic acid, the dispersibility of graphene in base oil was obviously improved...

So if one has to use those friction modification acids to disperse the Graphene, how does one differentiate the friction modification contributed by the Graphene and the friction modification contributed by those friction modifiers?

So while interesting, carbon nanoparticles have not proven any efficacy in real world automotive engine tests.

And with that we will close this thread.