Originally Posted By: blackman777
If the 0w-40 causes an emissions problem (which I doubt) switch to the ESP 5w40 which is just as good (or maybe even better) and designed not to poison catalysts
Originally Posted By: OVERKILL
ACEA A3/B3, A3/B4
Nissan GT-R
are certainly approvals, the other section is the wiggle-worded section
I don't know how to say this without you taking offense, but you are mistaken:
"Mobil 1 0W-40 motor oil has the following builders approval:"
MB-Approval 229.3, MB-Approval 229.5, BMW LONGLIFE OIL 01, VW 505 00..... etc
Nissan GT-R is not listed there.
VW 503 01 is not listed there.
SAAB is not listed there.
OPEL is not listed there.
et cetera
Why would I take offence?
The first section is meets or exceeds. These are approvals. Nissan GT-R and the ACEA specs are under this section.
We know Mobil's lubricants are certified by ACEA, meaning that this section is most definitely a source of legitimate approvals. Of course ACEA is not a builder, so their approval is not under the section for builder approvals. The Nissan GT-R spec, also under this section would most certainly point to this spec differing in some manner from the classification of builder approvals, hence it being under the "meets/exceeds" heading rather than the builder approval heading.
You need to look at this logically. If that section was not for officially met approvals, this would mean that the vast majority of Mobil's lubricants aren't officially recognized by ACEA. Are you telling me that you believe this to be the case?
With regards to the other specs mentioned, those are again under a separate heading and they are criteria that Mobil claims the lubricant meets, not the manufacturer. I don't know the details for each of those approvals and as to whether Mobil simply needs to demonstrate compliance to list them under the heading as they have done and that there is no "formal" builder approval for those or what the deal is. And unless you have some insider knowledge of the industry, you don't know either.
Now instead of this back and forth, I'm sure one of us could fire off the question to Mobil as to what the significance is of this 3rd heading and the specs listed underneath it. But that of course would lead to an end to your thread, a thread with a title that indicates an agenda, so I'm not sure if you really want the answer.