UPDATE: Team sources indicated, and NASCAR officials confirmed Sunday, that NASCAR will begin trying to phase in unleaded fuel, starting with the Busch race at Richmond Sept. 11. For environmental and other reasons, NASCAR has looked seriously for at least a year at developing unleaded gasoline suitable for NASCAR’s engine specs.(SpeedNet/Ben Blake)(8-31-98) – Good probability that NASCAR will go to unleaded fuel in all divisions in 1999.(NASCAR Today Radio)(9-1-98)
