“Scorched earth” test

[Mathson]

I have noticed a trend that all cheap mineral oils seem to retain their colour the longest in these tests. Why is that?

http://www.ekomobiili.fi/Tekstit/Oljytesti.pdf

Here is also one similar test from a finnish site. Winner is cheap Teboil mineral oils.

 

[dparm]

Originally Posted By: Mathson
I have noticed a trend that all cheap mineral oils seem to retain their colour the longest in these tests. Why is that?

http://www.ekomobiili.fi/Tekstit/Oljytesti.pdf

Here is also one similar test from a finnish site. Winner is cheap Teboil mineral oils.


Interesting observation, but again, a visual inspection is not terribly useful IMO.

 

[Shannow]

GrII turbine oils darken up a lot more rapidly with oxidation than GrI, as the GrI have more polarity, and can keep stuff in solution better...maybe part of the observation, maybe not.

 

[yannis]

I was reading the Russian comments and in page 11 there is someone who tried unsuccessfully to replicate the results .

GoodRon1975

http://goodron1975.livejournal.com/970.html

 

[Primus]

Hi BITOGers,
I would like to bring back the discussion on results of this garage test, namely, so called "frying". During our earlier disussion some members were expressing doubts on relevance of the test to the real life performance because of too high temperature. Indeed, 400 С is too high, but what's about 300-320 C ? Despite lower temperature results are nearly the same and the most "problematic" oils are still among ACEA C3 and Dexos2, as well as oils wherе particular DI package of Infineium with particular HSD (ShellVis) grade were used. Tests themselves starts at about 03:00:






Interesting that in 2012 after "frying" at 400 C many oils looked considerably nicer than in 2019 :
https://bmwservice.livejournal.com/27699.html

Also interesting that if to mix a non-problematic oil with a problematic one, the results will be like with a problematic one and the OCI changes nothing. So, if the design of pistons is prone to sticking/gumming, the type of oil will only speed up the process.

 

[edyvw]

Hi BITOGers,
I would like to bring back the discussion on results of this garage test, namely, so called "frying". During our earlier disussion some members were expressing doubts on relevance of the test to the real life performance because of too high temperature. Indeed, 400 С is too high, but what's about 300-320 C ? Despite lower temperature results are nearly the same and the most "problematic" oils are still among ACEA C3 and Dexos2, as well as oils wherе particular DI package of Infineium with particular HSD (ShellVis) grade were used. Tests themselves starts at about 03:00:






Interesting that in 2012 after "frying" at 400 C many oils looked considerably nicer than in 2019 :
https://bmwservice.livejournal.com/27699.html

Also interesting that if to mix a non-problematic oil with a problematic one, the results will be like with a problematic one and the OCI changes nothing. So, if the design of pistons is prone to sticking/gumming, the type of oil will only speed up the process.

If we are not witnessing a real methodological approach to test, the test is ABSOLUTELY irrelevant.
That is how science works.

 

[Primus]

If we are not witnessing a real methodological approach to test, the test is ABSOLUTELY irrelevant.
That is how science works.

Who was talking about science ? If you are witnessing metal particals in the oil or oil gelling, do you really need a methodological approach to understand something wrong with the engine in the former case or with the oil in the latter case ? As for relevancy, it seems that you have missed that once SonofJoe had said that some of actual oil tests are irrelevant too, but, nevertheless, they are required for qualification.

 

[2EHA]

As for relevancy, it seems that you have missed that once ?????? had said that some of actual oil tests are irrelevant too, but, nevertheless, they are required for qualification.

don’t ever say that again or the BITOG secret police will cart you away

 

[edyvw]

Who was talking about science ? If you are witnessing metal particals in the oil or oil gelling, do you really need a methodological approach to understand something wrong with the engine in the former case or with the oil in the latter case ? As for relevancy, it seems that you have missed that once SonofJoe had said that some of actual oil tests are irrelevant too, but, nevertheless, they are required for qualification.

So the point is? If it is not scientific, what is the point? Last time I checked oil is made through scientific process. I have never seen witches doing some craft around fire to get oil.
Do you need methodological approach? Well, here is the thing, if you ever need a surgery, ask surgeon to do "non-methodological" approach.
All performance data of certain oil is result of certain methodological approach. Methodological approach can be invented, improved etc. It is published in peer reviewed journals in the field and eventually, if it is breakthrough it is widely accepted.
So, again, how does this translates in oil performance in an engine? What does that mean for average consumer?

 

[marinerbc]

Motul oil have a shelf life of three years from manufactured date , just an example of how other factors can distort well intended compassion/experiment , engine oils are made to be tested in IC engine not in a frying pan or heat gun.

 

[kschachn]

Compassion?