8-10 months ago OPEC drops the price of oil significantly, and keeps it reduced, great for us consumers (lower prices at the pump), but massive layoffs in domestic oil production industry, a friend that works on a rig supply boat in the Gulf got laid off 4 months ago "we had 26 boats servicing the rigs in the Gulf, we're down to 3, the rest have been redeployed elsewhere (with foreign crews)...."
My brother-in-law works for Halliburton, the oil drilling and servicing company. He spends 6 months per year in Saudi Arabia. He says SA can make money with oil at $5/barrel, while American companies need at least $50/barrel...and that SA decided to make it a losing deal for Americans to drill for oil. So they increased the output from their wells to drop the price of oil. It worked, just like the law of supply and demand says. Don't ever believe the Saudis are our friends.
So oil prices are low, which kills the American oil drilling industry and their jobs. Now the bottleneck on U.S. gas prices is the lack of refining capacity. There's been no
significant increase in capacity for 40+ years, and most of the refineries are running at full speed. The gasoline supply chain is Drill-Extract-Transport-Refine-Distribute-Sell. If there's a bottleneck at any of those links, then price downstream will increase. It doesn't matter if storage tanks are full, since that is a tiny quantity compared to the daily turnover.
In war, you try to spend your money (limited resources) where it will have the greatest effect on the enemy's abilities to hurt you and to keep himself going. Destroying a refinery is golden, since they are complex, hard to build and operate properly, and will be out of service for a long time. Meanwhile, it will degrade their ability to grow food, to manufacture war materiel, and to distribute
anything. And how are they going to build a new refinery without producing and moving fuel, steel, and people?
Of course, if you can just prevent the enemy from building a new refinery for 45 years, you can win that future war without firing a shot.