I recall the past threads stating that Mobil 1 0W40 was only available in bulk (through oil change facilities and certain dealers. Mobil's website may acknowledge that 0W40 exists but it is still not available at retail stores in the Chicago suburbs.
BTW the local Target stores sell Mobil 1 at $3.00/qt.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles