Two different ways of measuring (and therefore different units of measure) of the kinematic viscosity.Bump with question. Maybe I misread, but it sounds from this write up like they test low temp and high temp viscosites, but the reports I've seen show "cst viscosity" at 100 degrees Celsius and "SUS viscosity" at 212 degree Fahrenheit. These are the same actual temp, so sounds like it's just a different scale they are measuring on (cst vs SUS). I haven't analyzed / compared various reports, but I found conversion formulas and tables, so all readings that show cst of 10.0, for example, would show the same SUS reading, 58.8 for this example, if I am reading correctly. Are they showing both SUS and CST just for convenience, because some customers may be used to one vs the other? I was actually hoping they were measuring at 2 different temperatures. That would be useful, and is what pds's show, right?