Although not directly related, the near-disaster at Three Mile Island on March 28, 1979, also increased anxiety about energy policy and availability. Due to memories of the oil shortage in 1973, motorists soon began panic buying, and long lines appeared at gas stations, as they had six years earlier. The average vehicle of the time consumed between two and three liters (about 0.5–0.8 gallons) of gasoline an hour while idling, and it was estimated that Americans wasted up to of oil per day idling their engines in the lines at gas stations.