Originally Posted By: Quattro Pete
Thank you, Scott.
I wonder how they calculated the VI to be 146. When I plug in their 40C and 100C visc numbers into Widman's calculator, I get 162. Anyway, not that critical. It's just a calculated value anyway.
My bad. I had the numbers entered wrong. It is 146. Their 40C visc is quite a bit different from spec sheet.