Hi Bro,

Not sure which particular black dots you are refering to , but it appears on the upper half of the blotter spot there are like 3 unbroken lines (or is it 2 ?) that were 'touching' supports from below the paper placements during the duration of dispersion of oil deposits/spots ...........
which is something to be avoided for 'perfection' but no harm in a way .

There is absence of darkened centre  zone and it is transparent , which is good news .

The aureole zone/perimeter ring is very vaguely/mildly darkened and is hard to identidy .....,
which is good news too .

Overall , there is no agglomeration of combustion by products  or commencement of breakdown of detergency/dispersancy properties of this 10.3k km  shu 5W40 used oil .

Not sure if the 300 ml of HDEO Rimula 15W40 has made any contribution to the above blotter with its stronger detergency/dispersancy properties in typical HDEO .

The diffussion zone is clean and light coloured , indicating quite low level of contaminants .

External jagged edge is only very vaguely and slightly darkened indicating lower levels of water moisture contamination for this 10.3k km used oil, but water moisture there is  .

No signs of translucent halo at the outermost zone indicating fuel dilution phenomenon is absent , probably from your appropriate pattern of running this Inspira 2.0L around town .

IMHO, this cocktail of SHU 5W40 with 300 ml of Rimula 15W40 at 10.3k km mileage is still serviceable and good to go , if you're comfortable about extending it .