In 1964, Texaco introduced the "Matawan" service station design at a station in Matawan, New Jersey. Two years later, Texaco replaced the long-running banjo sign with a new hexagon logo that had previously been test-marketed with the "Matawan" station design introduced two years earlier. The new logo featured a red outline with TEXACO in black bold lettering and a small banjo logo with a red star and green T at bottom. The following year, the Regent name was replaced by Texaco at British petrol stations. In 1970, in response to increasingly stringent federal emission standards that would ultimately lead to the mandating of unleaded gasoline in 1975, and later-model cars and trucks, Texaco introduced lead-free Texaco as the first regular-octane lead-free gasoline at stations in the Los Angeles area and throughout Southern California. Lead-free Texaco became available nationwide in 1974. On November 20, 1980, the Lake Peigneur/Jefferson Island disaster occurred. Two years later, a new service station design was introduced. Several product names were also changed with the advent of self-service including Lead-free Texaco to Texaco Unleaded, Fire Chief to Texaco Regular, and Super Lead-free Sky Chief to Texaco Super Unleaded.