It may be true at times that a higher mileage oil has less obvious centre ring than a lower mileage oil, whether or not it's a Mobil 1.
It appears to me mileage is not the one and only one factor that affects the 'shape' of a blotter spot test, though it's likely the primary one when we look at an oil's 'trending' in a blotter spot test .
Other factors like oil temperature , engine components temperature etc may 'shape' a blotter spot test centre ring other than lighting etc.

Edit:The 7000 km Mobil 1 ESP has indications of fuel dilution phenomenon, is the engine a Turbo direct injection type ?


This post has been edited by zeng: Mar 25 2019, 02:35 PM

Thanks for the reply. That has been very helpful.

Yes. The mobil 1 ESP 5W30 is on turbo gasoline direct injection engine. Is that normal to have dilution on this type of engine? The sample was taken when the engine is hot after about 1 hour travel.

Gasoline Direct Injection is more prone to fuel dilution problem.
If yours is a certain Japanese or American GDI, I would think it could be 'normal' as some OEM's seems helpless in preempting this problem for some SC's are clueless about the problem and its solution .
European OEM's seems to do better in this .

Anyway looking at your 7000 km blotter and strong specs of M1 ESP 5W30,


I would hazard a guess that it does no harm to the engine at 7000 km, and the oil is still serviceable IMHO.

Edit:BTW, this engine oil spec is recommended for 30,000 km OCI by European MB/VW.

Edit2: Since this 7000 km blotter was taken hot after an hour of travel, it's clear to me the outermost zone points 'solely' to fuel dilution phenomenon.
Most likely it's attributed to being a Gasoline Direct Injection rather than out-of-tune fuel system.

This post has been edited by zeng: Mar 27 2019, 08:26 PM

Thanks for the feedback. I did some readings on fuel dilution yeah it seems happen to many direct injection engines. Read that Acea C2/C3 oil works pretty well on engine suffer from fuel dilution.

Hi Guys,

One thing i do not understand that Shell Helix Ultra 5W-40 vs Shell Helix HX8 5W-40. Both are full sync. But why price wise different by so much? Around RM100 per bottle. Any diff? Are they both giving the same performance?

This post has been edited by tsg_7: Apr 29 2019, 12:44 PM

my guess its different quality for application

Imagine, Nippon paint having indoor paint and outdoor paint.

both made my Nippon, one is suitable for outdoor (helix Ultra), one is suitable for indoor (HX8)

Both are good quality paints

Ultra meets more stringent specs.

Their qualities are different.
Ultra 5W40 specs are higher, with BMW LL01, MB 229.5, Porsche A40 etc requiring higher grade base oil (GTL ?) AND higher quality additives package etc.
For applications that did not call for above OEM approvals AND oil change interval < 10,000 km say, they are the same.
For OCI > say 15,000 km , they may not be the same IDK.
In Europe Mercedes, Ultra 5W40 may be spec'ed for 30,000 km OCI. Helix 8 doesn't meet the requirements.




This post has been edited by zeng: Apr 29 2019, 08:33 PM

Thanks for the input.

Thanks for the info. Is the label MB stand for Mercedes Benz? Correct me if im wrong.
Anyway, just change to Shell Helix Ultra 5w-40 and hope my old engine wont take a sip or two of Shell when coming next service.

Yes, you got it right.
Most of the 'modern day' Mercedes Benz you see on KL/JB roads today requires MB 229.5 approvals found in Ultra.
HX8's MB 229.3 doesn't make it.

but what is the number stand for?
i.e. MB 229.5 / 229.3??

Just to share mine.

Car Type/Utilization/Speed/RPM
Type : Honda City iDSI Y2003
Utilz: 5.2km/week
Speed: <90km/h
RPM : <3000r/m

Last OD
Date: 04/02/2015
Odo : 50,709km

Blotter
Date: 04/06/2019
Odo : 57,506km

EO Type/Age
Type: Honda Semi Syn 5W30 4L
Age : 4y4m & 6,797km



This post has been edited by Trony: Jun 7 2019, 02:31 PM

Thanks for posting , Trony.
The centre zone is quite dark, indicating rather substantial levels of combustion byproducts , acidification etc.
Good news is there is absence of dark solid perimeter ring in centre zone , indicating the oil's dispersancy/detergency capability has not badly broken down yet, hence no irrepairable severe engine damage has occurred despite 4.5 yo oil in use.

Would I recommend 9000 km OCI and beyond ? Probably not and I personally may be comfortable at up to 7500-8000 km.

In a way, this 4.5 year old engine oil is not causing excessive engine wear rates , yet.
The darker centre zone is also caused by oil oxidation from unusually low usage AND long oil age, but it is still holding up fine ..... may be not for too long from now.

Outermost zone obviously indicate quite bad fuel dilution problem whereby its Kinematic Viscosity at 100*C (KV100C) may have dropped to 7.5 -8.5 cSt from virgin KV100C of around 10.5 cSt.
In a way this unusally low viscosity (caused by fuel dilution) is bad but I believe it's not causing bad metal wear due to your low usage and cold engine oil in operation most of the time.

The intermidiate zone is not darkened yet, indicating it has additional capacity to absorb more contaminants. However ,dark coloured solid centre perameter ring (representing failure in detergency/dispersancy oil capability) is something you want to avoid and look out for.

This post has been edited by zeng: Jun 9 2019, 09:53 PM

Thanks & agree with your analysis.

Max I'll go for 7500km OCI, iDSI may be responsible for the low centre zone contamination.

Other things I noticed are EO level never drops from last OD & engine still runs quiet during idle.

Just curious, are you using the same oil filter ?
Paper/Cellulose type filter ?

It's ori Honda filter same age as EO service by Honda SC.

Mobil 1 New Life 0W40 (from Tesco)
9642 km in 2005 Avanza 1.3 K3VE engine
ODO 289165 km
Blotter spot 48 hrs.




.......... and going

Hmm..no sign of obvious centre zone perimeter ring.

Switching from hdeo 0-30w to shell helix ultra 5w40 from giant

Wow, great blotter spot test with no sign of greyish/darkish centre zone demonstrating as 'virgin' detergency and dispersancy capability at 7110 km usage.
I like to speculate this quality HDEO could easily go on for another 5000-10000 km .
Btw, what oil brand is this ?
and I suppose it's in your Honda City?

This post has been edited by zeng: Jul 29 2019, 09:45 PM

Sorry Bro. I thought hdeo means Honda engine oil. Turns out its heavy duty engine oil. Last time I use Honda engine oil all these while. For this sample, I'm using shell helix full synthetic 5w40 bought from giant on promo rm89 I think. I have a bottle left, unfortunately after this next bottle I think I will switch back to 5w30 or 0w30 fully syn.

Yrs, its my honda city

This post has been edited by cempedaklife: Jul 30 2019, 11:41 AM