 A number of mainstream automobile manufacturers have used two-stroke engines in the past, including the Swedish Saab and German manufacturers DKW, Auto-Union, VEB Sachsenring Automobilwerke Zwickau, VEB Automobilwerk Eisenach and .The Japanese manufacturers Suzuki and Subaru did the same in the 1970s.Production of two-stroke cars ended in the 1980s in the West, due to increasingly stringent regulation of air pollution.