Folks should read the Wikipedia entry for the Lac-Mégantic derailment. It appears to me that accident had very little to do with oil and a lot to do with practices associated with the train.
If somebody leaves their malfunctioning car running on a road at the top of a hill and takes a taxi home for the night and then that car rolls down the hill, crashes, catches fire, blows up and kills some people, is it really the fault of the oil company that produced the gas for the car?
No amount of making sure the oil matched the rail car capabilities would've prevented the Lac-Mégantic disaster if the train folks did everything else the same.
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