Ok, visited the Sunoco website and they advertise sales of 100+ octane fuel at select locations. Here are the locations in Michigan and a link to the site:

http://www.sunocoinc.com/Site/Consum...s/Michigan.htm

Michigan


Speedy Q
910 South Main St.
Lapeer, MI 48446
(810) 664-5831

Fairgrove Oil Company
1788 South Main Street
Fairgrove, MI 48733
(517) 693-6600

Corrigan Oil
1172 Venture Drive
Whitmore Lake, MI 48198
(800) 327-8645

Speedway Store #3593
103 South Scott Road
St. Johns, MI 48879
(989) 227-1331

Van Manen Oil & Propane
0-305 Lake Michigan Drive
Grand Rapids, MI 49544
(616) 453-6344

Speedway Store #2290
880 E. Maple Road
Troy, MI 48083
(248) 585-6414

Speedway Store #2201
7 Mile Road & Newburgh
Livonia, MI 48152
(734) 464-3913