Shamrock Oil

==Shamrock==
=== 1929–1980 ===
In 1967 Shamrock Oil Merged With Diamond Alkali To Form Diamond Shamrock, The Shamrock Stations Were Renamed Diamond Shamrock In 1980
==Shamrock Oil ==
=== 2001–2004 ===
In 2001 Valero Energy Corporation Bought Diamond Shamrock, And Returned The Shamrock Name After A 21 Year Absence
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=== 2004-present ===
Category:Gas stations
Category:Better logo needed
Category:Valero Energy Corporation