http://www.sunocoinc.com/site/Consum...UnleadedFuels/
these places sell 100 octane
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
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
Corrigan Oil
1172 Venture Drive
Whitmore Lake, MI 48198
Contact: Steve Paul (877) 267-7442, ext. 101
Corrigan Oil
744 E. South Street
Jackson, MI 49203
Contact: Steve Paul (877) 267-7442, ext. 101
i have no idea where they are, as i live in ohio but i thought i would help you out.
brian