The Lincoln Oasis was added in 1968 and was different from the previous five oases in that it was an all-steel building designed by architect David Haid, a one-time student and employee of architect Ludwig Mies van der Rohe. The DeKalb Oasis opened in 1975 and was different from the prior six in that it was the only one of seven oases to not be constructed over the tollway. In the mid-1970s, Howard Johnson's took over the restaurants. One of the oases made an appearance on the silver screen when Carrie Fisher attacks The Blues Brothers at the Des Plaines Oasis in the 1980 film. In 1984, individual fast food restaurants took over from Howard Johnson, with the oases on I-90 and I-88 and the Hinsdale on I-294 being run by McDonald's and the oases on I-294 alternating between Wendy's and Burger King.