From the article:
The refining business is stable within the US. These companies have thin margins at 2.7%
A 2.7% margin is monopoly pricing? Has the author shared his stash with you? Sorry to be rude but do you think 2.7% profits are gouging?
“monopoly prices” does overstate the case currently.
My point was only that if you have two competing power trains and two competing fuels — then neither will be able to enjoy monopolistic power—which includes the power to set prices. Rather they will tend to compete against each other—which tends to put downward pressure on prices.