Preem was formed in May 1996 and quickly became a well-known brand. Today, Preem is Sweden’s largest fuel company with customers all over North West Europe. In May 1996, the industrial company OK Petroleum changed names to Preem, short for Preeminent. Preem quickly became a well-known brand through a merger of all Texaco stations in Sweden and all OK Petroleum stations in southern and western Sweden. Read more about Preem AB here.