Dear zeng,
Appreciate your opinion on this 48-hr blotter spot image. Thank you.

Car make: Nissan AD RESORT 1.6L (Carburetor)
Engine oil: Petro-Canada Duron SHP 15w40
Oil mileage: 11,145 km
Engine total mileage : 295,388 km
Driving condition: 90% stop-go , 4-5 times engine on/off daily
[attachmentid=9887867]

Hi chemistry,
This 48 hr blotter spot has a very large centre zone , but without a clear ,dark-coloured perimeter ring around the centre zone (which is a good news) indicating a very potent or strong dispersancy (and detergency) capability typical of a modern HDEO diesel oil.
Btw, this PC Duron SHP 15W40 is a semi-synthetic HDEO with ultra high specifications in CK4,E9, ECF-3, other than dual rated SN.
The rather grey colour of the centre zone indicates quite an amount of combustion by-products and contaminants etc in this 11,145 km used oil sample from a carburrettor old tech engine.
The intermediate diffusion zone is good and clear.
However, I find it interesting for being unable to 'see' the outermost transparent zone surrounding the jagged edges, indicating near zero fuel dilution despite your claim of 90% stop & go traffic condition.
It appears to me this engine is very well maintained.
This used oil sample appears to be serviceable for probably another 1500-3000 km , IMHO or speculation.

Bro zeng, taken after short ride 15 mins from pasar, 4k km, 4 months oil. Pic taken after 24 hours.

Any comments is welcomed.

Going to switch to aisin as per recommended but I have another bottle of this in stock. Will finish it up and continue take sample for the other bros reference

Still using Honda fully syn 0w30 engine oil.
This pic taken 60 hours after sample taken.

Last oil change did with throttle cleaning in workshop
https://forum.lowyat.net/uploads/attach-47/post-436947-1539217221.jpg

Hmm...... the centre zone perimeter ring appears very obvious, doesn't look good for its detergency/dispersancy.
I thought Honda 0W30 could do much better than that.
It could be due to cold temperature when doing sampling.
Next tests try do it hot, after say 20 minutes of 20 km run.
Check with previous posts from this thread, there was one Aisin oil type very impressive blotter spot test. Try use that particular one if you are going for Aisin.

cant remember if i take this cold or hot.
was thinking to switch, but till now unsure, if to go for aisin or shell. next change should be around jan.

Last oil change did with throttle cleaning in workshop

Just before pouring this oil, you did throttle cleaning ?
Edit: Your June 8 post saying sample was taken after 15 min from pasar, not this sample ?

Will it be okay to switch from 5w30 to 5w40?

I did the cleaning same day at the workshop and change engine oil. Can't remember what they did first. I yhink change oil first only clean.

June 8 is another sample.

cant remember if i take this cold or hot.
was thinking to switch, but till now unsure, if to go for aisin or shell. next change should be around jan.

24hr blot

Shell Helix Ultra Full Synthetic 5w30 (Made in Hong Kong)
Elantra 2002 1.8
Oil mileage 10,006 km

Good blotter spot test at 10060 km, no sign of centre zone perimeter ring indicating good detergency/dispersancy properties close to as new.
No dark grey dirt/contaminants in centre and intermediate zones,  indicating contaminant levels not very high at this high mileage.
No indication of fuels in outermost perimeter zone.
Engine appears to be in tip top conditions and well maintained.
This oil is still serviceable and could probably go for another 2000 - 4000 km and test.
Did you go on ?

Edit: Apologies for late response, alphaz.
Edit2: I personally consider this 10060 km SHU 5W30 blotter spot as performing relatively better than Honda 0W30 at 3750 km above.
Not trying to bash Honda 0W30 though.

Thank you zeng for your comments. I'm almost 14,000km on this EO now, I will do another test soon. This EO seems to be very good, it's a bit expensive at RM160 per 4L though. That's almost twice the price of SHU 5W40 one.

[attachmentid=9974084]
10099 km blotter

Update:

Car make: Nissan AD RESORT 1.6L (Carburetor)
Engine oil: Petro-Canada Duron SHP 15w40
Oil mileage: 12,558 km
Engine total mileage : 296801 km
Driving condition: 90% stop-go , 4-5 times engine on/off daily



@zeng : Appreciate your review on this 72-hour blotter spot. Anyway, I am changing the oil in a few days.