Here are some...
• changes in global supply and demand for oil;
• the actions of the Organization of Petroleum Exporting Countries;
• the price and quantity of imports of foreign oil;
• political and economic conditions, including embargoes, in oil-producing countries or affecting other oil producing activity;
• the level of global oil exploration and production activity;
• the level of global oil inventories;
• weather conditions;
• technological advances affecting energy consumption;
• domestic and foreign governmental regulations;
• proximity and capacity of oil pipelines and other transportation facilities;
• the price and availability of alternative fuels.