U.S. refining company Phillips 66 won a tender on Monday to supply state-run Petroecuador with 13 cargoes of premium diesel of 240,000 barrels each for delivery starting in October, traders told Reuters.

The Ecuadorian company, which has been increasing purchases of fuels since it started a major overhaul at its 110,000 barrel per day (bpd) Esmeraldas refinery in July, launched a tender two weeks ago to buy a total volume of 3.12 million barrels of premium diesel with maximum 50 parts per million sulfur .

The company expects to receive at least one cargo a month at its ports of Esmeraldas, La Libertad or Punta Arenas.

Traders added that Petroecuador agreed to pay $2.61 per barrel over the price of ultra low-sulfur diesel (ULSD) from the U.S. Gulf Coast.

Oil companies Citizen Resources, Lukoil, Repsol , Delaney Petroleum, Taleveras Petroleum Trading and Noble Americas also participated in the tender.

In August, a subsidiary of Lukoil won a previous tender to supply Petroecuador with 2.64 million barrels of high-octane naphtha, with deliveries starting in September, and Singapore-listed firm Noble Group won another offer to sell the state-run company five cargoes of naphtha RON 87.