- Sep 5, 2021
Very interesting, thank you for your insight on this.Let's not make things overly complicated. The resulting viscosity when mixing two oils
is linear enough and the result will be very very close to a simple calculation. Scientific
articles are saying this, VOAs with mixed oils are saying the same. I am aware there has
been some dispute about this a several times, but IMHO it isn't worth the effort. Even
if it was somewhat unpredictable, does it actually matter if the resulting mix is 11.4 cSt
or 11.6 cSt at 100°C? And how do you ever know? How precise is a Blackstone analysis?
No reason to lose any sleep over it. Mixing this 0W-20 with a stout 5W-40 will definitely
result in something thicker than mixing it with a 5W-30.
But again, I'd just use straight 5W-30 or a proper 0W-40 anyway.