Is it me or has MB Change their Motor Oil recomendation again or I am just not follwoing up with the times.

Back in 2000 MB said dino was o.k. And they changed it to full synthetic. And back then they said 10-30, 10-40 full synthetic was o.k. under most temperture ranges.

And now apparently 10-30 and 10-40 is not o.k. you need a 0-40 or 5-40 and only certain brands (for example only 0-40w Moble 1 is o.k. and 5-40 Moble 1 is no o.k.).

As a mechanical engineering who have not look at the reason and the test data behind the MB recomendations. Do it really make that much of a difference unless you are say below zero F?

Take it from honda. My 2006 accord only recomends 5-20 for all temperature ranges. And the 92 accord with 215k miles only recommends 5-30 (I believe did not look it up) again for all temperature and did not ever change their oil recommendstion.

blau

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987