Petro-Islam is a neologism used to refer to the international propagation of the extremist and fundamentalist interpretations of Sunni Islam derived from the doctrines of Muhammad ibn Abd al-Wahhab, a Sunni Muslim preacher, scholar, reformer and theologian from Uyaynah in the Najd region of the Arabian Peninsula, eponym of the Islamic revivalist movement known as Wahhabism. This movement has been favored by the Kingdom of Saudi Arabia and the other Arab states of the Persian Gulf.

Petrodollar recycling is the international spending or investment of a country's revenues from petroleum exports ("petrodollars"). It generally refers to the phenomenon of major petroleum-exporting states, mainly the OPEC members plus Russia and Norway, earning more money from the export of crude oil than they could efficiently invest in their own economies. The resulting global interdependencies and financial flows, from oil producers back to oil consumers, can reach a scale of hundreds of billions of US dollars per year – including a wide range of transactions in a variety of currencies, some pegged to the US dollar and some not. These flows are heavily influenced by government-level decisions regarding international investment and aid, with important consequences for both global finance and petroleum politics. The phenomenon is most pronounced during periods when the price of oil is historically high.