I still have a few quarts of Havoline 0W20 from a case of 12 that was given to me for free. I complained to Chevron executives in writing, that it was not worth using because it was nonexistent on the retail level. When I came home from work, it was at my doorstep. This was about 3 years ago.
The product data sheets for the ones I have were cst@40C of 41 and cst@100C of 8.0. That is about as low as you are going to find for a 20 wt. oil. It also carries Ford approvals. My son's, 2004 Ford Focus, mpg increased about 1.3 mpg over the previous Motorcraft 5W20 that was previously being used. The current ProDs version has been thickened up a bit, cst@40C of 45 and cst@100C of 8.5. Pretty typical for a 20 wt oil, so I have no desire to use it.
If you guys go to the trouble of looking for the Chevron distributor in your state, you too, can find it - just in time for winter.