Originally Posted By: jongies3
I wouldn't use it at anything below freezing because of this:
https://www.youtube.com/watch?v=uQ_vxdO_9nc&t=4s
"Below freezing" is a far cry from what they show there: -40 degrees (interestingly enough, in both F
_and_ C). From freezing point to what they're demonstrating there, we're talking a difference of 72 degrees F and 40 degrees C.
Having said that, If I lived in an area that regularly experienced sub-zero temps during the winter, I'd be much more likely to run a synthetic in winter.
Originally Posted By: jongies3
Yeah, oil's pressurized in the engine, but imagine how much harder the oil pump has to work to pump it if if gets like this. I don't see the benefit in saving a few bucks on ST when you can get a quality premium conventional like PYB, GTX, VWB or Mobil Super. Just because it meets SN doesn't make it a saint, not in my book, anyway!
Premium or not, running any conventional during -40 degree weather is going to give you very similar results to what was shown in that test. If you notice, the other 3 oils in that head-to-head were all synthetics. Only the SuperTech was a conventional, which placed it at a significant disadvantage, and it showed. Here in Phoenix, I'll contend that the SuperTech will hold its own for a standard 5-6k OCI against the other conventional oils you list above.
Originally Posted By: jongies3
As far as OCI length, I personally wouldn't run it beyond what the engine manufacturer recommends. That goes for any conventional. Ask yourself, at $9, is it really worth trying to stretch it out?
Manufacturer-recommended OCI is a good starting point, IMHO, but I let my engine, along with regular UOAs, dictate what is best for my driving habits. I regularly run 7,500 mile OCIs, many going farther than that, and I wouldn't hesitate to run ST if I needed to.
... I'd have to work through all the oil currently in my stash, however, before I got around to that. Might be a while.