@ZeeOSix that’s exactly the portion I was talking about, thanks for making it clear
@BusyLittleShop that was probably the discussion where I picked up the jello analogy from, however that discussion was about the test itself and I didn’t understand, at the time, why they were applying shear stress to the oil. But when engine rotates it applies shear forces to oil, so when cranking those internal oil shear forces need to be overcome by the starter.
Regarding the jello analogy, at the time I was only thinking about flow and ability to being pumped, since a positive displacement pump will make almost anything flow, not realizing that in extremely low temperatures, the wax crystals in oil can prevent it from flowing against itself, thus making the pump cavitate. And TomNJ’s jello analogy hits a home run in this regard, at least it did for me since I used this analogy without even remembering that old discussion.
Could CCS be used to determine oil pumpability? Maybe, since in order to crank an engine, the oil has to be pumped, but the test itself, as the name implies, is for simulating cold cranking, which needs to overcome oil resistance. MRV tests for flow into the oil pickup tube, as far as I know.
Fact is that both the CCS and MRV tests are needed to obtain a specific W rating and these ratings are not meant to represent flow at below operation temperatures, which was your assertion and what prompted my original reply. Which, BTW you didn’t address at all, but instead you quote other discussions not related to your assertion.
