I've read that the refineries are already at capacity so such an order will not make one bit of difference to those who know while the rest will see it as a do good feel good gesture.
US refineries are running at 94% utilization in June, in the very best of circumstances they’ll hit ~95-97% or so in Summer. So not quite perfect operations, but only 1-3% off right now. Every refiner right now is highly incentivized to maximize production - and they are other than intractable supply issues or maintenance failures.
Also, there are about 18 million barrels of refining capacity in the US, spread over 20+ competitors, and the largest single company has a market share of ~15%.
It is one of the most competitive and transparently priced businesses in the world. If you want to see examples of monopolistic price gouging and extreme anti-competition and anti-consumer behavior, you’d instead find many real examples entrenched across the US tech and drug industries…
Finally, the US can import substantial volumes of gasoline and diesel or blendstocks, but global prices are such that it generally loses money today except in specific marginal cases. Russia and China having issues running refineries is a major contributor to the issues. Point being that the US doesn’t control the global market.
Refiners worldwide are struggling to meet global demand for diesel and gasoline, exacerbating high prices and aggravating shortages from big consumers like the United States and Brazil to smaller countries like war-ravaged Ukraine and Sri Lanka.
www.reuters.com
While Biden could certainly try to use the DPA to takeover and restart refineries that were closed permanently during COVID as they were losing money, but that will probably take a couple years to get any restarted (they were generally shut down when in need of very expensive maintenance, and have already been stripped of critical parts for reuse elsewhere).