The thinking behind the question of whether oil would cost less today if it were priced in euros seems to be that, since the dollar has fallen relative to the euro, this would have contained the rise in the price of oil.
El razonamiento detrás del interrogante de si el petróleo costaría menos si estuviera cotizado en euros parece ser que, como el dólar ha caído en relación al euro, esto habría contenido la suba del precio del petróleo.