Since my g/f's car is going to need an oil change soon, I've been looking for this stuff for the past couple of weeks. This weekend, I hit pretty much every major store that carried motor oil looking, and asking to make sure it just wasn't out on the shelf but in the back, and no one had even heard of it.
The g/f and I took a Saturday cruise to Carbondale, IL (very southern town in IL that is basically a college town = SIUC). Even stopped in the O'Rielly's and the AutoZone their, same story.
Well, we stopped at Walmart on the way out of town, and I figured, what the heck, I'll look here....Well, they had it. One row of Mobil-1 0W-20. No jugs of it (not even in their oil change shop), so I bought 5 quarts of it for her next oil change.
Hopefully by then they'll have it around here - St. Louis, MO area.
So, the stuff does exist, it's just not widespread yet.
Chuck