API crude oil inventories data for the week ended May 29 will be released by API.
This data is out to API subscribers at 4.30pm ET and released publicly at 4.35pm ET

The API data is closely watched as its thought to give an idea of the EIA data due tomorrow morning (10.30am US eastern summer time - that's 1430GMT).

The consensus 'expected' on the EIA release tomorrow is for a draw of 2.078m barrels.