Particle Count Database

[oil pan 4]

Can you post the actual particle count data they show in the UOA that has the raw ISO 4406 particle count data?

I did this exercise awhile ago by looking at Blackstone used oil analysis posted on BITOG that also had ISO 4406 data , and found no real correlation between Blackstone's "Insolubles %" and the ISO 4406 particle count data. Some of the used oil analysis that had higher Insolubles % had lower particle counts, and also used oil analysis with the same ISO code had a difference of 3x in Insolubles %, so I wouldn't go by any Insolubles % data as an indication of oil cleanliness. The actual ISO 4406 data is what needs to be compared.

I think for Blackstone to conclude how much an oil filter was loaded by trying to correlate it to Insolubles % is really reaching.

There was none. It just said "dirty".
If you say there's no correlation that's good enough for me.
I'm thinking if I'm going to do a particle count, do the home microscope test first then if I don't really see anything, then do a particle count.
My next particle count test will probably be reclaim oil ran though a used wix nano particle fuel filter.

 

[ZeeOSix]

There was none. It just said "dirty".

You said it was a Royal Purple. Did you cut it open and inspect the leaf spring to end cap fit for any leak gaps?

 

[oil pan 4]

You said it was a Royal Purple. Did you cut it open and inspect the leaf spring to end cap fit for any leak gaps?

Yeah it had impressive crud in the bottom.

O

Thread 'Royal purple filter, 9.3k mi'

Jul 24, 2025

2 oil changes does not disappoint in the sludge department

First oil change was Pennzoil Platinum 5w30 ran 5,704 and the second oci was Pennzoil Platinum 10w30 HM ran 3,625 miles.
Hyundai sonata hybrid 2018.

Imasay that about the limit.

• oil pan 4
• Replies: 20
• Forum: Engine Oil Filters

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