Originally Posted By: jb2trbof150
none of the Mobil 1's meet the 929 spec....heard that testing for the HTO spec can't be done because the lab that does testing was destroyed by natural disaster?...seems like a stretch...Sunami maybe? I like the abundant amount of friction reducing materials within the oil, folks comments about how quiet their engine runs on this oil, mpg gains, good UOA's, and comparison to other 5w-30 full synthetics, that meet 929 spec!
See this thread:
https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2562456
Quote:
Hello Volk06,
This is Jamie again from Ford's Customer Relationship Center. Thank you for writing back to us and for your patience while we escalated your inquiry to a Technical Subject Matter Expert.
According to their resources,
the WSS-M2C946-A oil specification is the newer specification that replaces the WSS-M2C929-A specification. It will be the proper engine oil engine oil to use with the WSS-M2C946-A specification.
I hope the information I provided helps. Thank you for contacting Ford Motor Company.
Sincerely,
Jamie
Customer Relationship Center
Ford Motor Company
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