Engine oil without polymers

[bluesubie]

https://bobistheoilguy.com/forums/threads/viscosity-index-improvers-are-not-bad.238547/

 

[kschachn]

Amsoil reads very well in the data sheet, but it has no official approvals and is therefore out of the question for me. At Ravenol, I have read several analyses in the forum, I think I can claim that it does not perform miracles or does not perform better than other oils if you want to consult the analyses. I did not observe strong viscosity stability!

What analysis are you referring to? Using a $30 spectrographic analysis to gauge comparative oil performance?

 

[CarfriendXX]

When it comes to the stability of viscosity. USVO should do this, unfortunately several CH e analyses show that viscosity collapses sharply even after a short term.

 

[OVERKILL]

So I understand correctly that the use of a 0W40 or 5W50 does not form more and no less deposits than, for example, the 5W30 from mobile? I thought this could happen due to shear?

They may actually produce fewer deposits because of the lower volatility (Noack) and deposit control tests/limits imposed by MB, VW, Porsche...etc.

 

[CarfriendXX]

Then I guess I have to reconsider what exactly I will take now. But Mobil 1 is safe

 

[OVERKILL]

When it comes to the stability of viscosity. USVO should do this, unfortunately several CH e analyses show that viscosity collapses sharply even after a short term.

How much fuel was in those samples?

 

[CarfriendXX]

Fuel inputs were almost always identically low or not decisive for this drop in viscosity. However, it is interesting that these "Ultra strong viscosity oils" decreased remarkably strongly compared to other oils.

 

[OVERKILL]

Fuel inputs were almost always identically low or not decisive for this drop in viscosity. However, it is interesting that these "Ultra strong viscosity oils" decreased remarkably strongly compared to other oils.

Were these being measured by labs that use GC?

 

[CarfriendXX]

GC?

 

[OVERKILL]

GC?

Gas Chromatography. It is the only way to accurate measure fuel content. Some labs, like Blackstone, just infer it from flashpoint, which is horrifically inaccurate.