That's not the right spec, 229.31 is different than 229.3 and it doesn't show up on the 229.3 or 5 lists.

The spec lists are on page 3 of this thread:
https://www.crossfireforum.org/forum...il-deal-3.html

From the manual:

For best performance and maximum protection under all
types of operating conditions, only use synthetic engine
oils, approved to MB 229.3 or MB 229.5, such as Mobil 1

SAE 0W-40.