. . . EXHIBIT 21.1 SUBSIDIARIES OF GIANT INDUSTRIES, INC. (A DELAWARE CORPORATION) Jurisdiction of Names Under Which Subsidiary Incorporation Company Does Business ---------- --------------- --------------------- Giant Industries Arizona, Inc. Arizona Giant Refining Company Ciniza Pipe Line Company Giant Transportation Giant Service Stations Giant Travel Center TransWest Tank Lines - - Giant Four Corners, Inc.* Arizona - - Navajo Convenient Stores Co., LLC** New Mexico - - Giant Mid-Continent, Inc.* Arizona - - Phoenix Fuel Co., Inc.* Arizona Phoenix Fuel Company Mesa Fuel Company Tucson Fuel Company Firebird Fuel Company PFC Lubricants Company - - DeGuelle Oil Company* Colorado - - Ciniza Production Company* New Mexico - - Giant Stop-N-Go of New Mexico, Inc.* New Mexico - - San Juan Refining Company* New Mexico - - Giant Pipeline Company* New Mexico - - Giant Yorktown, Inc.* Delaware - - Giant Yorktown Holding Company* Delaware - --------------- *A wholly-owned subsidiary of Giant Industries Arizona, Inc. **Giant Four Corners, Inc. has a 66 2/3% interest in this entity.