It's good to know that our oil drain interval can be of much longer, ever since i found bitog forum. The forum discuss the EO extensively thw good, bad, extended and normal oil change interval.
It's been slightly more than a year since the last oil change, so it's time for me to change as it recommend so by most sifu out there.
Next change, one of the World recognise OIL. Castrol

Hi. Chemistry, Did not replace the oil filter at 10k, as i find that it will do the job as suppose to.
There are lots of debate out there on the oil and filter change interval, where two camps of people will advise on different effect of the interval of changes.
It's just me and mine opinion that lead me not to change the oil and filter so soon.

Chhers &
Smile Alwsys

Your driving style is easy on oils , in a 2010 City the engine oil should 'well behaved' , but ......

Hi, alphaz ,
Very good blotter spot tests performance, and there is no signs of centre zone perimeter ring developing indicating this oil detergency/dispersancy properties are still in good shape, despite the mileage .
The slightly greyish zone indicates increased level of contaminants and combustion byproducts at 14,160 km which is well dispersed and good .
But that's nothing to be alarmed about as I believe this used oil Helix Ultra 5W30 is still in serviceable condition.
Should the oil be still in use, may be take another blotter spot in 2000 - 3000 km and see how the centre zone goes .....

This post has been edited by zeng: Nov 26 2018, 08:11 PM

Hi zeng,

Here's a 24 hour blot test result at 16,000 km, Shell Helix Ultra Fully Synthetic 5w30 Made in Hong Kong, in Elantra 1.8 2002.



It seems to me that it might still be good for another 2000 km I suppose?

This post has been edited by alphaz: Dec 25 2018, 06:43 AM

Hi alphaz, that's a very robust 16000 km blot.
There is no sign of centre zone perimeter ring (of 8-10 mm diameter) indicating great capacity of dispersancy/detergency of this used oil sample.
Btw, there is some fuel dilution as indicated in the outermost zone but the oil is strong.
2000 km ? I would speculate shouldn't be an issue if you wish to go for it.
Btw, my SHU 5W40 is currently at 16500 km.
Time to locate my 14000 km blotter picture that I promised prior.

daikor zeng

i'm also thinking of submitting a blotter, would like to know the sample should be taken when engine is cold or after a drive?

Wkc,
If alphaz sample above was taken after a drive of say > 30 minutes, then the outermost zone or ring indicating fuel dilution may attribute the source of problem to ill tuned fuel injection system, in particular in a carburrettor engine or gasoline direct injection engine.
If the sample was taken cold or < 5 minutes of driving, it's quite normal for most (or any ) engines to demonstrate this phenomenon.Therefore it's hard to point to out-of-tuned fuel system timing as the cause .
Hence it's best to take the blotter sample after driving for say, > 20 minutes to rule out the above 'confusion' .

This post has been edited by zeng: Dec 27 2018, 05:04 PM

Hi Zeng..... will appreciate your insight in this blot test. The blot was taken more than 48 hours ago, 15mins after engine switched off.

Since we have seen mostly fully or semi synthetic blot tests, I think we might be curious how ye olde mineral oil will fare Thanks in advance.

EO : Formula Shell 10W-40 SN (Mineral)
Mileage done : 5,466 km since Oct 2018
Car ; Wira 1.6 year 1999

Hi Speedy,
What's the ODO total mileage ? Is it carburrettor or fuel injection ?
There isn't any center zone perimeter ring which is good news for this 5466 km blotter spot test, for it indicates this used mineral Formula Shell 10W40 dispersancy/detergency properties are still in top shape .........
meaning there is still life in this used oil.
There isn't much contaminants as the blotter spot is not darkish or greyish. It may indicate a well maintained engine , never mind it is 1999. IDK.
However I will bench mark this Formula Shell 10W40 against Senscents Formula Shell 5W30 8500 km blotter spot and I would like to speculate they share similar additive package.
Not sure if there is any fuel dilution, as I couldn't 'magnify' the image or see clearly its outermost zone.
I would recommend continue its service for another 2000 km or so and see how its next blotter spot performs.

This post has been edited by zeng: Dec 28 2018, 04:24 PM

Delete.

This post has been edited by zeng: Dec 28 2018, 04:14 PM

My wira has done 395k km, or exactly at 394,888 km when the sample was taken. It has a 1.6litre engine with MPI, but on manual transmission, never overhauled.

Senscents' oil was the fully synthetic version of the series. Both dino and fully synthetic were sold under Formula Shell label. Mine is the basic mineral version, now selling for rm67 5qts at shopee.

Noted on the extra mileage b4 the next test. TQ again.

At 395k km, your engine appears very good shape by looking at your blotter spot.

Now, your mineral Formula Shell 10W40 has a VI of 154 :



Compare this against Senscents' so called fully synthetic FS 5W30 (which at times claim mineral ) , also has a VI of 157 :

My interpretation of Formula Shell 5W30 SN is also a mineral oil, not quite a fully synthetics as occassionally claimed.

I really like to see your FS 10W40 at 8000 - 10000 km blotter spot and see how it fares.

This post has been edited by zeng: Dec 30 2018, 12:17 AM

I think the correct PDS for Formula Shell 5W30 Synthetic is as below..... it has obviously higher VI than the mineral version.

Hi Zeng,
Below is my Wira 1999, 1.3 engine oil. Please give me a reading. EO used at 1537km. Thanks.



This post has been edited by BravoZeroTwo: Jan 1 2019, 05:22 PM

Hi BZT,
Absence of centre zone perimeter ring, which is good news and quite expected for a 1500 km oil.
There is a lot of life left, and may be take another blotter spot test at 3000 - 5000 km from now and evaluate.
Btw, what's the oil type and viscosity grade ?

This post has been edited by zeng: Jan 1 2019, 07:59 PM

HI Zeng,
Am using Caltex Magnatec 10W-40. Mileage is 234131km.

14100 km blotter spot at 72 hrs, Shell Helix Ultra 5W40 (bought from Giant).

Absence of centre zone perimeter ring, and going ......




This post has been edited by zeng: Jan 8 2019, 11:15 PM

Thanks, BZT.
This is probably SN only.
Magnatec 10W40 with SL and A3B4 used to be available from Tesco/Aeon Big, but no more now.

Hi Zeng,
Which is a better EO to use for my ride ? Is SL higher than SN ? My EO I got it from the workshop and it is locally made. Thanks in advance.