Oil traders - heads up for private inventory data at the bottom of the hour

The official data is Wednesday morning US time

For now though, the private survey. Subscribers to that service will get it at the bottom of the hour, and tweeters will get it out more widely after that.

The latest Reuters survey has expectations for a fall of around 2.3 mln bbls in headline crude stocks for the week (ended May 12). That would be a sixth straight weekly decline.