Are you refering to the slightly grayish/darkish 'stain' just outside or external to the (2-3 mm width) Translucent Zone ?

Would very much like to see blotter spots BEFORE and AFTER the seafoam for knowledge/experience sake.

yes the thin 2-3mm after the patch. Overall how is this Mobil 1 5w30 EP oil perform?

I wouldn't have noticed the 'stain' external to the Translucent fuel dilution Zone if you hadn't pointed it out here .

This phenomenon is 'new' and alien to me at the moment and I am unable to explain why, may be somebody here can come out with some explanation on the 'stain' in this used oil blotter spot .

As to the condition of this used Mobil 1 EP 5W30 oil sample at 7000 plus km , I would speculate it is still fit for continuing service as there is absence of centre zone, indicating detergency/dispersancy capabilities of this used oil are still in top form nontheless.



At the same time, the intermediate diffusion zone is transparent, light yellowish colour though there is obvious grayish/darkish soot floating around.

You may want to compare your blotter spot against this 7000 km M1 ESP 5W30 C3 VW 50400/50700 blotter.

Edit: Btw, what type of paper are you using here as it appears quite good quality ?

This post has been edited by zeng: Aug 21 2019, 12:07 AM

My 2 cents only, don't hit me if I'm wrong.

I would say that the stain is good. The oil is doing it's job by bringing insolubles/dirt all the way to the boundary layer edge. If it is poorer condition, the darker areas will be around the center.

Agree with your positions above.

In the event of conflicting 'facts', I'm of the opinion that MB approval listings from MB should prevail with it's periodic updates and consistency/professionalism . It represents an authoritative source.

Unless this HX8 X 5W30 was tested and approved by MB to MB 229.5 approval, it would be inappropriate for Shell Msia to list "MB-approval MB 229.5" on packaging of HX8 X 5W30 in picture as provided by 90Boyz .

Btw, product data sheets of almost all other regional Shell sites indicates HX8 (without X) 5W30 as MB 229.3, as is the case with its 5W40 version . Having said this, no appropriate product data sheet is made available online by Shell Msia thus far.

This post has been edited by zeng: Aug 21 2019, 08:18 PM

API SL intro in 2001 ;

API SM intro in 2004.

Hence SL is definitely suitable for engines released in 2001 or before.

Alternatively, as specified in respective car owner manuals.

Thanks for the clarification.

I guess conclusion of the story is, despite being the same range and branding name, always check the blending plant.

Different plant may have different variation of the same range depending on where it is sold to

speaking on tis..
i bought 3 shell helix ultra from Giant and 3 of them from diff country
germany , italy , turkey

another picture with lights from behind.



This post has been edited by cempedaklife: Sep 4 2019, 04:33 PM

+1

If one looks hard enough, after-seafoam sample (8109 km usage) may be a bit darker than that of before-seafoam blotter spot (7989 km usage) but it could be placebo effect as you'd differentiated them separately in the notes.

However, I couldn't see the difference on samples with light on at the back, may be the light is too bright eliminating the picture contrast.

On it's own, the after-seafoam sample (8109 km usage) demonstrates normal and acceptable levels of soot/insolubles/dirt whilst absence of clear cut dark centre zone indicates the oil detergency/dispersancy capabilities are still intact and in good shape.

I would speculate this after-seafoam oil sample is still fit for continuing service, taking note that you'd decided to replace the oil in a few days' time.

This post has been edited by zeng: Aug 23 2019, 02:03 PM

Yup. Agree with what you have said. I Do feel that generally the oil looks darker after seafoam.whether seafoam really works or not is a different story. Haha. And I know the pic with lights behind is too bright. But since I have took it, might as well share.

I'll be changing the oil over this weekend. Either tomorrow or Sunday. I feel that I should change the oil before it gets dirty. Even without seafoam. I think as long as its around half year once for fully syn I'm fine owyh it and it's time to change. . Idea behind is that it'll will also be good that my engine always runs on clean oil. I feel that half a year once, buying own oil, servicing outside workshop is saving enough.

As promised. I will be sharing another just before change. And then after change.

Thanks for all the insight !!

Assuming seafoam works to remove 'dirt' from engines, not that I don't, and believing how almost all engine oils are replaced/changed at generally very early stage/mileage of oil usage ,my approach of using seafoam would differ from yours.

Namely I would do seafoam on the intended engine at say,5000 km before one's comfortable regular oil change intervals to be followed by periodic blotter spot test at every 1000/1500 km intervals .....
and decides from there on as to when to dump the oil.

In this case of your comfortable OCI's of 8000 km (of whatever fully synthetic or semi synthetic or mineral oils), I would conduct seafoam at 3000 km usage, after which carry out blotter spot test every 1000/1500 km intervals .....
and eventually replace the oil at possibly 6500/7500 km or whatever km, when one gets panic and uncomfortable with the blotter spot test 'performance' .

By this time, most or majority of 'dirt' that a seafoam can unstuck from an engine would have been removed before the next 'round' of seafoam-related contamination in the next OCI's.

With blotter spot test as a tool, I personally would not follow exactly 'methods' recommended on internet where most of which are based on hearsay/kiasi/bias/blind speculation.

Of course, there is no right or wrong way at the end of the day.

This post has been edited by zeng: Aug 24 2019, 01:22 PM

Q: When should I change my engine oil ?



Source.

This post has been edited by zeng: Aug 25 2019, 11:29 PM

Upload on behalf of a friends of mine wish to know the condition of the oil

Mercedes Benz S600 6.0 V12 year 1994
Bought over from owner and previously car sit in the garage over a year before tow back to workshop for repair and service
Oil use : Shell Helix HX3 20w50
Oil mileage: roughly 400Km
Odo meter : unknown as meter spoiled

This post has been edited by 90Boyz: Aug 26 2019, 10:21 AM

Hi,
Short answer:Tell your friend this 400 km oil is good and fit for continuing service.
Long answer will come after some readings on S600 and history of API/ACEA then.
Btw, exactly what mechanical repair/service was done ? or just replace engine oils only ?

This post has been edited by zeng: Aug 26 2019, 03:59 PM

Hi Zeng bro,
Appreciate the explanations ..
repair/service : to replace faulty fuel pump and 12pcs of spark plugs .. other than that, everything basically untouched.

This 1994 MB S600 6.0L V12 is a W140 carrying an M120 engine with port fuel injection system.

A bit of history , back in USA the API SH (obsolete) was launched in 1993 whilst SJ was launched in 1996.

In Malaysia ,this MB S600 would have called for SH (which wasn't available in Malaysia until probably 1995/1996) or SG which was available beyond 1994.

Recommended OCI (oil change interval in km) back then had always been 5,000 km for our local petrol with sulphur content of around 10,000 or more ppm (parts per million of Sulphur in petrol) .
However, this MB S600 was likely imported European version into Malaysia as used car.

In Europe, it likely called for European spec CCMC G4 or G5 petrol engine oils whose specs is over and above that of API SH.
This engine probably called for similar oci of 5,000 km with pre-Euro 1 petrol of sulphur content around 5,000 ppm in Europe then.

Now, this Shell HX3 20W50 API SL far exceeds the original API SG/SH specifications requirements of MB back in 1994 and bearing in mind that currently available Malaysian petrol is more superior and cleaner at Euro II (500 ppm Sulphur) or Euro VI (50 ppm sulphur) petroleum standards, I'm of the opinion its oil change interval OCI should be good for 5000 km or likely more, assuming a reasonably maintained engine condition.

Now, coming back to your blotter spot.

In relations to other blotter spot pictures at Post #1 , this 400 km usage HX3 20W50 engine oil is a bit on the 'dirty' side as demonstrated by its darker shades of soot/byproducts of combustion and oxidation within the intermediate diffusion zone.

Is it due to poor engine oil quality or 'dirty' engine internals ? IDK for now but it likely could be both, who knows.

However upcoming blotter spot tests on this oil probably could tell us something more as we progress from here .

The good news now is that the dirt/byproducts/soot is of small size, small quantity and light enough to be carried by the oil far away from the centre/deposit zone into the external diffusion zone . This indicates oil oxidation is not serious enough and its detergency and dispersancy capabilities are still in tip top condition and hence this used oil is fit for continuing service, IMHO.

It also shows absence of fuel dilution problem , probably all 12 fuel injectors are working normally with a new fuel pump in place. The blotter also shows absence of coolant/glycol problem in the engine.

You may need to check with your friend about his comfortable oil change interval. Assuming a tentative OCI of 5000 km, I wish to suggest taking a blotter spot test at every 1,000 km interval from now on for evaluation/comparison of used oil conditions , until say km 4000/4500 with a view of making a final decision then whether to proceed with replacement of this HX3 20W50 sample at 5,000 km as intended.

Just my 2 sen.

Edit:Your friend should seriously consider MB-approval oils in future, not oil spec'ed in API only.

This post has been edited by zeng: Aug 27 2019, 03:02 PM