China’s crude oil imports from Russia in August surged 28% from a year earlier, official data showed on Sept. 20, but it handed back its top supplier ranking to Saudi Arabia for the first time in four months.

Imports of Russian oil, including supplies pumped via the East Siberia Pacific Ocean pipeline and seaborne shipments from Russia's European and Far Eastern ports, totalled 8.342 million tonnes, data from the Chinese General Administration of Customs showed.

The August amount, equivalent to 1.96 million bbl/d, was slightly off May’s record of nearly 2 million bbl/d. China is Russia’s largest oil buyer.

Russian imports rose as Chinese independent refiners extended purchases of discounted Russian supplies that elbowed out rival cargoes from West Africa and Brazil.

Emma Li, China analyst with Vortexa Analytics, said actual Russian supplies are likely on par with Saudi shipments at close to 8.5 million tonnes. Several cargoes of Russian Urals crude were reported as originating in Malaysia, according to ship-tracking data she has compiled.

The Sept. 20 customs data showed imports from Malaysia, often used as a transfer point in the past two years for oil originating from Iran, Venezuela and more recently Russia, nearly doubled from a year earlier, to 3.37 million tonnes, or 794,000 bbl/d, a record high. 

China’s purchases from Russia have climbed to reap the benefits of a plunge in European buying as the Ukraine crisis pushes Moscow in search of alternative markets.

Still, imports from Saudi Arabia rebounded last month to 8.475 million tonnes, or 1.99 million bbl/d, 5% above the year-ago levels.

Saudi Arabia also remains the biggest supplier on a year-to-date basis, shipping 58.31 million tonnes of oil from January to August, down 0.3% on the year, versus 55.79 million tonnes from Russia, which was up 7.3% from the year-ago period.

China’s crude oil imports in August fell 9.4% from a year earlier, as outages at state-run refineries and lower operations at independent plants caused by weak margins capped buying.

The strong Russian purchases continued to weigh on competing supplies from Angola and Brazil, which fell in August by 34% and 47% year-on-year, respectively.

Customs reported no imports from Venezuela or Iran last month. State oil firms have shunned purchases since late 2019 for fear of falling foul of secondary U.S. sanctions.

However, Reuters reported that defense-focused China Aerospace Science and Industry Corp. (CASIC) has moved 25 million barrels of Venezuelan crude into China since late 2020, which Chinese customs does not report.

China did not import any crude from the U.S., data showed.