Typo on the date for second picture?

For the second picture, oil is dark and contaminated definitely due for a change.

I would advice against using till such condition as with contaminant shown through oil dip means there may be plenty down somewhere within the block, bearing or anywhere within reach of the oil. Clearly the oil filter is no longer working in this case.

Cannot brain the logic behind haha. Mind to elaborate on the oil taken before and 48 hours after?

- double post -

This post has been edited by kirakun: Feb 17 2017, 12:18 PM

Thanks for the clarification.

I'm still curious though, how did the visually visible contaminants went missing after 48 hours? Dried and evaporated into the thin air?

I do agree on the oil doing it's part as a part time cleaner for the engine however i'll say the color of the oil will be a more appropriate marker as the gauge, don't u think so? With that being said, isn't the oil filter supposed to filter the contaminants down to 5 or 10 microns(human hair is 45-70 micron)?

Since the oil filter is present and doing the filtration, how can the visually visible contaminants still present in oil dip? A clear indicator that the engine is mighty dirty or just the oil filter/oil is way due for replacement or both.

Don't get me wrong i also do agree that UOA is the proper mean to gauge the properties of the oil though.

This post has been edited by kirakun: Feb 17 2017, 01:35 PM

Perhaps chemistry should do another try, this time on a proper base to find out haha.

Edit: I have done spot test as well before on tissue and toilet papers but the unevenness observed was in patches rather than dots lol.

This post has been edited by kirakun: Feb 17 2017, 01:38 PM

There is no need to get agitated. I never claimed that "my oil filter" is that good. Also didn't claim viscosity of the oil can be determined through visual inspection nor flash point or any else. Just pointing out that the fact on how an oil filter can filter accordingly as per what was stated. Taking no credit here nor deserve any. Also what I state by gauging the condition of the oil is also based on my point of view that it is absolutely not practical for me and I believe the majority here to get a UOA analysis done during OCI. So I'll just based on the typical recommended mileage aside from color of the oil and buttfeel to know when and at what mileage an oil change is required. But again that's just me.

.

A personal butt feel review on Liqui Moly Top Tec 4100 5w40 synthetic blend:

- Oil goes dark after 4 months of use and 5k km mileage
- Engine significantly consume more fuel onward
- Engine noise during cold start is significantly louder and a slightly rougher drive onward

OC done to mobil 1 0w40 after 6 months at 7k km mileage.

Using on 2GR-FE engine.

Just can't bring myself to let it slide on to 10k km lol.

Previously was on Motul H-Tech 100 plus 5w30, also done the OC around 6k km mileage. Same occurrence.