DP-G Oil - 75w90 or 75w140?

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As per title, which do you use?

Owners manual says 75w140, workshop manual states 75w90, or 75w140 in commercial applications.

Bit confusing! I've been using 75w140 as per user manual and no problems in 10 years of ownership, just curious as to the forums thoughts...

 

[BruceK]

According to the Book of Words: The one that specifically deals with which oil in which drive, listing all drives.

 

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I spotted that. I'll stick with what has worked for the past 10 years! (75w140) - I actually change the oil at the end of every season so it's filled with fresh 75w140 as we speak.