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

Sure , your pleasure .

The Centre Zone of about say, 8 mm has not heavily darkened and became opaque, hence it has not formed yet from the agglomeration and coagulation of combustion products .

The Perimeter Ring of about say, 10 mm  annulus ring surrounding the Centre Zone has not formed or visible with darkened colour.

Both the above shows no trace of agglomeration and coagulation of combustion products in this Urania LS mid-SaPS HDEO at 5000 km  .

The complete circle of Outer Diameter 20 mm of light grayish colour indicating quite an even distribution of all the dirts and contaminants of combustion .

Exterior to the above 20 mm OD circle shows light yellow colour and looking transparent,  indicating very low level of contaminants and dirts in the used oil .

Overall, this blotter spot indicates the detergency and dispersancy properties of this 5000 km used oil is still in tip top condition . IMHO it is still serviceable for another several thousands of km .

Btw, this mid-SaPS Petronas Urania LS 15W40 has a very powerful specs in CJ4/ E9 etc .

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Note:May I know the (petrol) engine type in use here and its current odometer readings ?

Hi ,
This 2000 km blotter spot of Toyo Semi Syn 10W40 is still in good shape and remains in serviceable condition for many thousands of km to come , IMO .
The centre zone is clean ,light coloured/yellowish and transparent indicating negligible amount of higher density contaminants or dirt .
A semi-circle of very light gray coloured aureole zone/perimeter ring is about to emerge .
Diffusion zone is light yellowish ,clean and transparent indicating very low levels of contaminants and dirt .
Absence of darkened jagged edge surrounding the diffussion zone indicating absence of water moisture in this 2000 km blotter spot .
No visible translucent halo at the outermost zone indicating no signs of fuel dilution .

Shell Helix Ultra 5W40 has a very powerful specifications in MB 229.5 which is recommended for 30,000 km by Benz in appropriate engines in Europe .
It is a full synthetic solely or mostly of GTL base oils and probably contains no or very little PAO or ester .
It has strong additive package containing  Molybdenum and Boron .
Semi Synthetic Toyo 10W40 has only SN (?) specs to 'boast' .