SuperAmerica, a convenience store chain founded in 1960 in St. Paul with five locations in Duluth, will now be known as Speedway.

The change follows the recent merger of Marathon Petroleum Corp., the Ohio-based owner of the Speedway brand, and Andeavor, which has owned the SuperAmerica brand since 2016.

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Marathon CEO Gary Heminger told Fox Business in May the combined company, now the largest refiner in the U.S., will “take a Speedway platform coast-to-coast.”

“Andeavor had many brands they were using in the company-owned company-operated system,” he said. “We will turn those into Speedway and have one system.”

Since its first store opened on Seventh and Wall streets in St. Paul, SuperAmerica or SA has had a number of owners over the years - including, for a time, Marathon. This is the first time the Minnesota-bred brand has ceased to exist, however.

There are about 170 company-owned SuperAmerica locations and 114 franchised stores largely in Minnesota and Wisconsin, according to the company, with more than 2,000 employees in total.

In Duluth, Speedway listed the following stores on its website. 602 E. Fourth St.; 1704 Woodland Ave.; 1002 88th Ave. W.; and 5601 Miller Trunk Highway. The Lakeside SuperAmerica at 5310 E. Superior St. and the Superior store were not on that list, though all locations are expected to become Speedway at some point.

Marathon did not immediately return requests for comment on Thursday.

On Friday the company said the changeover began on Oct. 1, and beyond the new branding becoming more widespread in the coming months, customers "may see additional upgrades and remodels to further enhance the customer experience at these locations."

"While the signage may be changing, customers will continue to be greeted by the same friendly, helpful store associates that they have come to know and appreciate," Marathon spokeswoman Stefanie Griffith said in a statement. "The most significant change will be the introduction of Speedy Rewards, Speedway’s industry-leading loyalty program."

Regular customers are asked to move their My SA Rewards balance at The company says SuperAmerica gift cards will no longer be accepted; call 1-800-428-4016 to have balances refunded.