Thats the thing, Im trying to suss what volvo are up to.
Thing is, take a 2002 D5, it was specified B4 when the rest of the range were A5/B5, there is a reason for this, it changed to B5 when switching to euro4, there is a reason for this.
The people on the parts counter, or sat in an office at headquarters dont understand, and will often make the same mistake the general public make in assuming new always supercedes what went before, when in the case of oil specs this doesnt always follow suit. They arent oil or engine people, they dont get it, thus will blindly make assumptions.
You yourself are clearly very experienced and a well respected forum member/tech source, but were under the impression that A5/B5 replaces A3/B4 when its crucially different in an important parameter and should not be used where not specified, Acea say this, not just me. Yet you have been innocently telling people to put the wrong oil in their cars, and have yourself been putting the wrong oil in peoples cars. It wasnt ignorance as such, youd just misunderstood or been led to believe something incorrect. This happens all the way up the ladder.
Sometimes companies just dont care about the older vehicles and are happy to recommend any old ****e.
Thus, what was stated at point of manufacture should always be followed, where possible.
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