Hi Bro,

There is a very light-coloured and transparent centre zone in this 12k kms Aisin FS Pao Ester 5W40 blotter spot indicating there is very minimal or absence of high-density heavy metallic insolubles or contaminants in the used oil.

There is no sign of imminent darkened aureole zone/perimeter ring indicating absence of agglomeration of combustion dirts and contaminants.

The diffusion zone is clean, light coloured and transparent indicating very low levels of light-density contaminants or soots despite its rather high mileage.

At the outermost edge unlike most other >10k kms blotter spots, this 12k kms blotter doesn't exhibit any darkened jagged zig-zag external edge, even slightly, indicating very low levels or absence of moisture content and/or oil oxidation phenomenon reflecting top class anti-oxidation/detergency/dispersancy capabilities of this used oil sample.

Translucent halo at the outermost zone is absent, indicating absence of fuel dilution phenomenon.

This 12k kms blotter is comparable in performance against the other 12k kms blotter spot, also of an Aisin Pao Ester which together fares so much more better than most if not all blotter spots as found in Post #1 of this thread.

Overall, imho this 12k used oil still has plenty of life to go on.............

Bro, do note that this Aisin Pao Ester oil is a mid-SaPS (Sulphated ash Phosphorous Sulphur) oil formulation  which I  consider as generally superior and better than a typical high SaPS oils as commonly found in the market.

Just my 2 sen.