76 (formerly Union 76) is a chain of gas stations located within the United States. The 76 brand is owned by Phillips 66 Company. Union Oil Company of California, dba Unocal, the original owner and creator of the Union 76 brand, merged with Chevron Corporation in 2005. 76, Conoco, and Phillips 66 market their brand of gasoline under the brand name PROclean. As of October 2004, PROclean brand fuel was included onto the list of fuels recognized as "Top Tier".