Out here California, they seem to get it once or twice a year. It's only an "end cap special" that different manufacturers get throughout the year (meaning the end display on isles gets rotated out between different products/sales/specials). It will be $18.88, but only for as long as they are getting it in, which is usually only for a couple weeks. $3.77 is a lot better than $5 a quart, especially when you have five cars that run M1 exclusively. Go stock up!
Mobil 1 is probably the best oil that is available almost everywhere and not that expensive because there are other oils out there liek Royal Purple and stuff but they cost more and are harder to find. Mobile 1 is just the most effective way to go if you ask me
Mobil 1 is good oil but not great.
It's a notch below of what are considered to be the best oils out there - RedLine, Amsoil and Schaeffer which will keep your engine cleaner and show lower wear number in oil analysis.
And they are not that expensive considering that you can safely prolong you oil change intervals up to 12-15K miles.
I buy RedLine for $7.00/qt here. Keeps my engine clean as a whistle at 55K miles.