About a month ago I did a quickie comparison of WTI in USD, CDN and Euros.
Look here:
http://f1.grp.yahoofs.com/v1/4IYUSJxlnM7LcmBb8mXyl2gsWBokGImn42WvNP-IbuP...
At the time it looked like for the past year about one third of the price increase of WTI was related to the dollar decline.
Since the G7 meeting the USD is being defended against the Euro so even tho WTI has kept its cost in USD it has increased in cost vs the Euro meaning that oil is costing somewhat more in USD and a bit more than that relatively in Euros.

I was very much interested in your comparison but unfortunately I couldn't make your link work. Seems to be broken, tried it several times.

Sorry eastender .. it seems to work when I click it .. are you using IE for a browser?

Yes.

Tried it this morning (9:37 AM here) and still can't make it work, sorry. Neither IE nor Firefox were able to open it. In fact all I got was a 'file not found' screen.