NASCAR to switch to Unleaded Fuel starting 2008: NASCAR will use unleaded fuel for its racecars and trucks beginning in 2008, making the switch from the high-octane leaded fuel that it has used for decades. Gary Nelson, NASCAR's vice president for research and development, said yesterday that the series had been testing a new fuel since the fall and that early results had been promising. The fuel, Sunoco 260 GTX, will be used in Nascar's three main racing series - Nextel Cup, Busch, and Craftsman Truck. Nelson said it was already being used in the Grand American road racing series. "Sunoco came up with a formula that really seems to do the job," Nelson said in a telephone interview. "It does a very good job inside the engine," he said, adding that "we've got more testing to do and more work to do." NASCAR is exempt from the 1970 Clean Air Act, which required the transition to unleaded fuel for all automobiles. But the series has worked to find an unleaded substitute for years. Nelson had said there were problems finding a fuel that provided the same lubrication as lead. The new fuel alleviates that problem without using MTBE, an additive that had been considered in the past but was rejected because it was barred in some states as a health hazard.(New York Times)(1-20-2006)

UPDATE: NASCAR announced that a special unleaded fuel has been developed and will be used by the start of the 2008 season as a result of its partnership with the U.S. Environmental Protection Agency and its fuel supplier, Sunoco. “We’ve been back and forth to the drawing board for several years to find an unleaded fuel that is compatible with NASCAR engines. NASCAR congratulates Sunoco and is proud of the progress it made on developing a fuel that works in NASCAR engines,” said Gary Nelson, NASCAR’s vice president of research and development. NASCAR tested a number of possible alternative fuels in recent years, but none that didn’t cause engine problems. NASCAR tested an unleaded product in its NASCAR Busch Series in the late 1990s. However, the tests were unsatisfactory and required the sanctioning body to conduct further research. Other fuel solutions were incompatible and led to engine failure. NASCAR began testing the current unleaded fuel, Sunoco 260 GTX, last fall at its Research & Development Center in Concord, NC. The fuel will be used in the NASCAR NEXTEL Cup Series, NASCAR Busch Series and the NASCAR Craftsman Truck Series.(NASCAR PR)(1-21-2005)