Hi Bro,

Thanks for uploading these 48 hour blotter spot tests which I believe have kind of 'matured' and are not having vastly evolving changes with time,  in the image.

Basically these blotter spots are lacking in undesirable 'structures' ..........
meaning the used oil conditions are in top form with plenty of life to go.

Centre zone (of about 8 mm diameter size in real sample) is not darkened and is clean and transparent, which is good news as it indicates very little or negligible amount of heavy and/or big sized contaminants/dirts being present in this 3k kms 5 months 5W30 sample.

There is also absence of darkened aureole zone/perimeter ring indicating the oil's detergency and dispersancy capabilities and properties of the used oil is intact and in top form.
Besides , there is absence of coagulation of contaminant particles which is good news.

Diffusion zone external to 'perimeter ring' (which is not darkened here) is light coloured and transparent showing very very low levels of combustion contaminants/dirts.

Darkened and jagged edge outside of Diffusion zone is absent , indicating absence of undesirable water moisture content in this 40-minute operation hot oil.

At the outermost zone, there is some slight appearance of translucent annulus called halo which indicates mild level of  fuel dilution phenomenon in this hot blotter sample, which remains harmless for now with very little contaminants/dirts in this 3k kms 5 month used oil sample.

Overall IMO there is a lot more oil life to go on and this used oil is fit for continuing service.

Can this used Syntium 5W30 continue to be in operation till Odo 140k kms, meaning a 10k kms oil change interval or 12 months use in Campro ?

Well, I believe this Syntium 5W30 should perform well till then whilst you may continue to take blotter spot test say, at 6000 km and 9000 km mileage with a view of establishing the possibility of 10k kms oci, at a level/mileage comfortable to you.

Don't worry about the 'black dots' you mentioned  as they are merely 'imperfections' in sample taking on a used/old A4 sized paper and it doesn't distort the 'reading' of blotter spot.