different compositions. what we call "oil" actually ranges through so many configurations you might as well think of it the same way we think of juice. sulfur and other impurities can change the game dramatically.
it's also the reason Alberta's tar sands have few importers, because not everyone is capable of refining it (which leads to Canada having to export it, and import foreign oil).
there are refineries in the US that only work effectively on Russian oil -- and I'm sure there's similar issues elsewhere in the world. they can probably adapt but it's not as uniform as we'd think.
> "The refineries do not rely on Russian oil equally. Nearly 60 percent of Russian crude imported to Washington went to the Tesoro/Marathon Anacortes refinery, and another 29 percent went to the BP Ferndale refinery. Russian crude made up almost 7 percent of all crude refined at the Tesoro/Marathon Anacortes refinery from 2009 through 2021."
Getting oil from Bakken or Pennsylvania would likely be expensive, and also refineries are optimized to process specific grades/types of crude oil. The best solution would be for the US government to prioritize the transition to renewables in Oregon and Washington.
Certainly it's more cost effective to obtain it domestically than to import it from the other side of the world?
[1] https://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=PET&s=M...