I did locate a source of Sae 10w non-detergent motor oil in the Chicago area .Thanks to those who suggested a farm supply store . This oil can be purchased at Blaine'S Farm and Fleet Stores . The brand name is Mystik and is manufactured by Citgo Petroleum Corporation, Tulsa , Oklahoma , 74102 .Blaine's has a web site and has stores throughout the great lakes area . The stores can be located through this site. Blaine's also carries Sae 30w non detergent oil.