"Turkey has played a key role in facilitating the life-blood of ISIS’ expansion: black market oil sales. Senior political and intelligence sources in Turkey and Iraq confirm that Turkish authorities have actively facilitated ISIS oil sales through the country. Last summer, Mehmet Ali Ediboglu, an MP from the main opposition, the Republican People’s Party, estimated the quantity of ISIS oil sales in Turkey at about $800 million—that was over a year ago. By now, this implies that Turkey has facilitated over $1 billion worth of black market ISIS oil sales to date."
“$800 million worth of oil that ISIS obtained from regions it occupied this year [the Rumeilan oil fields in northern Syria — and most recently Mosul] is being sold in Turkey. They have laid pipes from villages near the Turkish border at Hatay. Similar pipes exist also at [the Turkish border regions of] Kilis, Urfa and Gaziantep. They transfer the oil to Turkey and parlay it into cash. They take the oil from the refineries at zero cost. Using primitive means, they refine the oil in areas close to the Turkish border and then sell it via Turkey. This is worth $800 million.”