Oil, is no longer just oil.
It has gotten very good, and the manufacturer specs as to what oil is acceptable to that engine, should be followed, especially while the engine is stillunder warranty, and perhaps more so if one intends on keepin the vehicle.
5 quart jugs os oil at wal mart, are why I goto walmart, and the oil I use, M1, 0w-40 is not because i need a 0-w oil, it is because this oil needs to meet the pretty stringent specs of many German engines, and is Robust, with a high TBN, HTHS, and simply makes my engine quieter than the other oils I have so far used, and I change it once a year to 18 months.
The one time I got it analyzed by blackstone labs, the TBN, total base number/ acid fighting component, was still well into the green.
Will this oil make my engine last longer? Who knows, but it gives me warm and fuzzies for a few dollars more than other oils which would likely be "just fine"
Like a higher dollar oil filter rated for 15K miles. I will not get to 15K miles on an oil change interval, but I will spend the few extra dollars for a silicone antidrainback valve and a higher filter efficiency rating and a higher build quality I might never need.
Oil, is not oil. Perhaps it once was, but no more.