There are some fundamental errors in that article.
Crude oil is not the same the world over, neither is the product therefrom. For example, 95% of a barrel of Orinoco Heavy becomes heavy products like kerosene and diesel, very little is able to be refined to gasoline. Alberta oil sands has a similar trend, more of the fraction is diesel compared to say Brent or Saudi light.
America was slow in small-car diesel development largely due to California, the biggest market for such, prohibiting diesels in anything smaller than 1-ton pickups. It took Mercedes with the ecotec motor to convince them (after about 30 years) otherwise.
BTW. just filled up tonight east of Edmonton at 122.9, Gas Plus.
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