I actually don't know.
The question to ask, I guess, is:
Has ANY oil actually caused an engine to fail?
Typically it's a cooling system, lack of maintenance, assembly goof up, design screw-up, even a metallurgical failure - NOT just a plain old: "the oil was lousy, engine died"....so that leads back to (sung to the rhythm of a kids song such as "We are the pirates, who don't do anything....we just lay around all day...) :
WE ARE ANAL
YES WE ARE
WE DO EVERYTHING
TO OUR CAR
ARE WE ANAL?
YES WE ARE
WE ADD AUTO-RX and SYNTHETIC OIL
WE USE THE BEST FILTERS
IF WE FIND OUT WHAT THEY ARE!!!