SINGAPORE - Middle East crude benchmark Dubai, as quoted by price reporting agency S&P Global Platts, fell for a second month in December to an average of $73.208 a barrel, a trade source said on Friday.

This is the lowest since September.

The monthly averages for December for Dubai and Oman as quoted by Platts are shown in the table. Middle East producers set their monthly official selling prices (OSPs) at premiums or discount to these averages.

Saudi Aramco changed the benchmark for setting its OSPs to Asia starting from October 2018 to the average of Platts Dubai and DME Oman crude futures. 

Dec Nov Change Platts Dubai 73.185 80.276 -7.091 Platts Oman 73.208 80.493 -7.285 Platts Oman/Dubai average 73.200 80.385 -7.185 Platts Dubai/DME Oman average 73.163 80.268 -7.105

(Reporting by Florence Tan, Editing by Jane Merriman) ((Florence.Tan@thomsonreuters.com; Reuters Messaging: florence.tan.thomsonreuters.com@reuters.net))