mike wrote
Scott Dorsey wrote

Same way you compare any two oils.

Alls you have is the jug in your hand when you're at the store.

Nope, you can research what the store has online before you go there.

Do you know of any real reviews (unbiased, not shills, not bull****)?

The certification tests.

Viscosity breakdown with time, viscosity curve with temperature,
adhesion, solvent characteristics, ability to keep particulates in
solution, three-ball test, etc.

All oils "breakdown with time."

Yes, but some to that slower than others.

Nothing wrong with replacing oil every single day but I'm asking about
specifications for synthetic oil when the factory shop manual is followed.
https://addinol.de/en/products/lubri...pecifications/

There are standards for all this stuff and in general the European
standards are tighter than the US ones.

As the saying goes the problem is there are so many standards.

But some are better than others with oils.