Editing Wankel engine (section)

===General Motors===
At its annual meeting in May 1973, General Motors unveiled the Wankel engine it planned to use in the [[Chevrolet Vega]].<ref name=regupunv>{{cite news |url=https://news.google.com/newspapers?id=dgQrAAAAIBAJ&sjid=0pcFAAAAIBAJ&pg=2887%2C3398436 |work=Reading Eagle |agency=UPI |title=GM unveils rotary engine |date=May 27, 1973 |page=3}}</ref> By 1974, GM R&D had not succeeded in producing a Wankel engine meeting both the emission requirements and good fuel economy, leading to a decision by the company to cancel the project. Because of that decision, the R&D team only partly released the results of its most recent research, which claimed to have solved the fuel-economy problem and built reliable engines with a lifespan above {{convert|530,000|mi}}. Those findings were not taken into account when the cancellation order was issued. The ending of GM's rotary project required AMC, who was to purchase the engine, to reconfigure the Pacer to house its [[AMC straight-6 engine]] driving the rear wheels.<ref name="RTINh">{{cite book|url= https://books.google.com/books?id=fJ_qWhCZm04C&q=AMC+Pacer+Wankel+six+cylinder&pg=PA122 |title=The Big Book of Car Culture: The Armchair Guide to Automotive Americana |first1=Jim |last1=Hinckley |first2=Jon G. |last2=Robinson |page=122 |publisher=MBI Publishing |year=2005 |isbn=978-0-7603-1965-9 |access-date=2011-12-11}}</ref>