I’m pretty sure US refeneries are not setup to refine Saudi oil.
I remember it being the case with Venezuelan oil and that fact being a boon for West African oil producers when things were sour between the US and Venezuela.
This is also largely true. Saudi oil is generally pretty light but sour. The fact the US has a lot of refineries set up to process heavy oil means its literally not set up to process Saudi oil. Another good example of how taylodl really has no clue about what they're talking about.