Well, I have a few thoughts on all of that. Having once been in the business of making diesel ( and gasoline and jet) and then in the trading and marketing of it.

1. The refiners have already planned how to handle this.
2. High prices will cause much more production to take advantage of windfall pricing.
3. High prices will cause a reduction in demand.
4. High prices bring imports.

Combine all of those factors and I think you can see that prices won’t be extreme. Expect added cost from additional refining and treating, which will be irritating but not cost prohibitive.

Relax...

But I could be wrong...Nahhh