Oct 11 2021, 09:57 PM
QUOTE(tchinhe @ Oct 11 2021, 05:58 PM)
Hi Bro,
It is somewhat odd to me as well. I had collect it myself and didn't see it on the paper before.
Doing another blotter today. Will see how it goes. Hopefully nothing to do with the fiber balance shaft breaking down.
Ahhh.... Bro that makes some sense that the blackish stuffs may be potentially of fibre material, who knows? It is somewhat odd to me as well. I had collect it myself and didn't see it on the paper before.
Doing another blotter today. Will see how it goes. Hopefully nothing to do with the fiber balance shaft breaking down.
Ok, for now let's make the assumption that the blackish particles is 'foreign' and not part of the emulsified oil sample from which you took blotter spot test samples.
Other than the blackish 'foreign' particles stuff, the Centre zone is transparent and not darkened which means there is almost no large size or heavy metal wear contaminants within the oil sample which is good news.
The slightly 'clearer' second blotter picture here of 6000 km usage (compared to previous first blotter picture posted on Oct 7) points vaguely to the very preliminary stage of potential emergence of increasingly darkened aureuol zone/perimeter ring.
Fact is the slightly darkened aureole zone has not formed, yet!
This is something important for us to monitor for the eventual possible formation or emergence of (very) darkened or greyish aureole zone/perimeter ring with continuing use of this 6000 km Castrol 20W50.
The Diffusion zone is clear and transparent, clearly pointing to the negligible or very low levels of fine size contaminants or combustion by-products within the oil sample.
There is absence of darkened zigzag jagged edge at the outside edge indicating absence of moisture and/or absence or low levels of oxidation phenomenon, which is really good news for a mineral oil at 6000 km usage.
Very slight halo phenomenon at the outermost zone pointing to some very slight amount of fuel dilution in this 54.5k kms 2016 Estime engine.
Overall I think this 6000 km Castrol 20W50 mineral oil is fit for continuing use if you do desire, as I believe the detergency and dispersancy properties of the used oils are basically intact unharmed and there is very little oil oxidation if any.
On fibre balance shaft in an Estima .......
Note: I would estimate the size/lengths of the 3 sides of the 'blackish' triangle as about 2.5mm X 2..5mm X 1.5 mm in the real physical sample. Is the estimate off?
This post has been edited by zeng: Oct 11 2021, 10:23 PM
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Sample was taken right after a 350km outstation drive.
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