Crazy, isn't it?
I've looked at Meijer, AutoZone, Pep Boys, Murray's, etc for this oil. NOBODY has it.
One possible source is online, per the below.
http://www.amazon.com/gp/product/B00...53294&v=glance
$6.49 a quart from Auto Barn, plus $7.50 to ship all of the quarts it is going to take to get the job done. Do a few Google searches, and see if you can get it any cheaper.