Originally Posted by
amx1397
Factory says Mobil 1,,, 0-40
MB
recommended 0W40 up until 2011.
Since then, MB
recommends 5W40 and by default, dealers will provide 5W40.
The list of approved oils include 0W30, 0W40, 5W40 and 5W50 and at least one 10W40.
....and 99.9 % of the people on the forum use mobil 1 0-40
Based on interactions with others, I'd say most of us have moved to 5W40. Iv'e not been able to source Mobile 1 5W40 since moving to Texas, I've not used any Mobile 1 product since moving here OTHER than in the manual transmission and differential.
Details about just what oils are recommended and why can be found by an internet search for "MB 229.3" and "MB 229.5".