Originally Posted By: d00df00d
Companies can "recommend" their product for, or say it "meets the requirements of", any spec they want. That's what doesn't require re-testing. Or even testing in the first place. It just requires some confidence/cojones.
If they want to claim approval for those specs, the oil has to be... approved. That means they have to pay for it.
We seem to agree that dropping LL-01 was likely no accident for Mobil 1 FS 0w-40. There had to be a reason. But to say it must therefore be a "worse" product when it still has approvals like MB 229.5 and Porsche A40 is a bit absurd. It's no longer explicitly approved for BMW LL-01. BFD. Neither is Motul 300V, or TGMO 0w-20, or Mobil 1 5w30. Those are all fine oils for their intended applications, just as Mobil 1 FS 0w-40 is still a fine oil for applications requiring the approvals it still carries.
What I'm saying is, I highly doubt that each new reformulation is recertified across every test, they probably only do that when they have a brand new product. That's just how non-official commercial certifications usually work...
For example, Klipsch makes a new set of headphones that are THX certified. They change the foam padding or slightly tweak the materials of the housing from one product year to another, don't change the model number, they're not going to get it recertified THX, they can just recarry that branding. THX is certifying hundreds if not thousands of products, they're not going to notice that the same product that they certified last year isn't exactly the same. Now keep doing that several revisions and after a few reformulations you go from a great first product to a much cheaper worse product (Just like how M1 0w40 used to be a great base oil)...