per Kyle's find on machinelube, why we see almost every oil get cloudy when cold enough, but we never seen redline get cloudy. Would it be that redline would freeze at some point but still be clear? dunno, sounds possible...
What Causes Oil Cloudiness
There are many ways an oil can lose its shine. We've already mentioned soot, air and water (liquid and vapor) as common causes of cloudiness. The following list includes a few more:
Undissolved Additives. For various reasons, a properly formulated oil may lose additive solubility. This is referred to as additive drop out. Cold temperature can cause this in certain oils. The result is a slight cloudiness and even some precipitation (settling of the additive insolubles).
Dead Additives. The normal decomposition of certain additives during service can lead to white, flocky appearance of the oil.
But once again, someone choose a random test point of the oil, why? Because at his random test point any oil would operate, think back to viscosity charts, almost any oil winter rated 15 or lower with operate in -15, so he could put twenty or thirty or forty oils on his little ramp, and they all would have flowed similar. But, only 5 or 10 degrees cooler and that group 3 would have crawled, and redline would have flowed the same. That guy choose the random tempature of the test, WHY? WHY is the question, because he knew they would both flow. He could have really done something special by simply lowering the temp of that test 10 degrees, instead he choose a temp where oils are basically the same. Same with his hot test, purposely testing it lower then noack temps, what does that do? Once again, he could have really done something special and that would have been very easy, not like needing a special freezer to get to -25, it is easy to make a hot plate 500f, and that would have really showed the difference between esters/pao and mineral oil.
Someone posted a test, someone should expect it to be reviewed critically.