i'm told rail in canada is between 8 and 15 per bbl,depending on back haul and whether you own the cars,pipe somewhere around 6.in the right situation it works but at its basic strictly a profit on the spread.this month is obscene-arsenal energy just reported that they get 30 off the wti which is 18 below brent.

warren buffet and cpr will straighten some of that out near term as they have most of the stuff in place.

the longer the pipe dramas play out the more rail will gear up.heavy oil to refinery too from some of the newer producers without upgraders.in the end it's all about money.couple of articles for you

http://www.reuters.com/article/2011/02/04/oil-railways-idUSN0423693220110204

and an alternative

http://www.theglobeandmail.com/report-on-business/industry-news/energy-and-resources/transcanada-looks-east-as-gateway-pipeline-gets-bogged-down/article2378494/

have a good one.