The price of oil decline has sparked the inevitable fight over disappearing profit margins...Refineries mostly scheduled for maintenance shutdowns already have had labor walkouts(USW) in a dispute over non-union labor performing maintenance work at refinery plants, claiming it's a safety issue...It's mostly just a walkout on paper not really effecting output, but even the hint of gasoline supply disruption has driven prices up largely by hedging strategies of large fuel consumers and nervous commodity markets....
http://www.reuters.com/article/2015/02/22/us-refineries-labor-strike-idUSKBN0LP06420150222
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