Quote:
Originally Posted by SE
I was pretty sure it wasn't a synthetic. Weird how Nissan recommends an oil change at every 3750 even if it really is a synthetic.
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Seeing how easily this oil shears out of grade to a 20 weight within the first 3K miles on various Blackstone UOAs, I'm not surprised that Nissan wouldn't recommend OCIs longer than 3750 mi. Personally, I wouldn't push this oil past 3K miles unless I was doing only low-speed driving where oil temps never got above 220 deg F.
Seeing how high the flashpoint is, about 230 deg C, I would suspect that the base stock oil is probably a PAO with very little, if any, conventional oil in it.