BP, Shell and Chevron seem to be one the "big" oil companies & they are well entrenched in North America & US but the ownership is elsewhere.
Once upon a time diesel fuel was signicantly less expensive than gasoline fuel in the US. Today it is now more expesnive than gasoline. This is partly due to higher costs to formulate diesel fuel to comply with ever increasing EPA regulations. Thereby, increasing the cost of ownership thru increased fuel costs & added engine system maintence.
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