There was a story on BBC radio yesterday morning about possible low stocks/shortages. Here's a link:

http://news.bbc.co.uk/2/hi/business/6684745.stm

Apparently, there has been low fuel supplies (refineries closed down) in the US coupled with high demand.

There has been sabotage to a pipeline in Nigeria somewhere I think I heard.

And oil is reaching USD 70 a barrel due to concerns about US/Iran, plus no doubt due to the other factors.

That's what's happening globally at the moment.