Oil pressure question...I promise it's not another "who likes what' thread!

DrCharles said
Sorry, but that is just not true. ALL motor oils become thinner (less viscous) with INCREASING temperature.
The multi-grade ones will not thin out AS MUCH as a single-grade but they will all become less viscous. The 5W-50 becomes as thin as a straight 50 would when hot, but it's still thinner than when it's cold.

Just google "oil viscosity chart" and you will see that every single one has a negative slope (viscosity drops with increasing temperature).
Click to expand...


I’ll see if I can find the chart that shows the centistokes and centipoise measurements for oil at winter grade and 212 degree F temps.

I understand what you are saying, but the winter grade base oil wouldn’t be anywhere near as viscous at 212 degrees as say a 50 is. IOW’s, the oil at its winter grade temp flows what it is, and at 212 it has the viscosity of a 50 grade. If it didn’t, you’d be running a single grade oil.