Here's a primer for you, sport. Yes, I know it's CNN, but it's just a collection of the relevant data.
The key takeaway from this is that the United States is in a position where it can legislate not purchasing Russian oil on its own with no appreciable affect, but it risks crashing the entire market if it start sanctioning that oil. The key difference is that once sanctions are in place, other countries will have to avoid purchasing Russian oil so as to not somehow run afoul of those sanctions (either by the US or by any of its allies that follows suit) and there isn't enough oil in the global markets to offset the loss of Russia. As the article points out, we are still the world leader in oil production and the two biggest sources we import from are our North American neighbors - we are already "energy independent" in the sense that our source of oil isn't dependent on major overseas suppliers. Conversely, sanctions would also most likely disproportionately affect our European friends because, while the cost would skyrocket for us, we wouldn't be dealing with a supply crunch.