“The US is not a major consumer of Russian crude oil, which makes up less than 4 percent of US consumption, so banning imports shouldn’t have a huge effect; the US doesn’t import any Russian gas. The US can make up the oil gap with imports from other countries, and the Biden administration already is pursuing that path by opening talks with Venezuela. Nor is Russia all that reliant on the US, because US purchases account for about 9 percent of its exports.
The bigger impact on the price of oil comes from what Biden’s announcement portends. Global oil prices have been fluctuating wildly in recent days, reflecting that there is a wide range of uncertainty over what could happen next. One of the uncertainties is whether more countries will follow the US’s move to ban imports, taking Russian oil off the table for a number of foreign markets. Cutting out Russia makes oil more expensive, because it upends the existing network of pipelines and makes countries’ paths to getting oil longer and more expensive.”
https://www.vox.com/2022/3/10/22967368/oil-gas-prices-russia-ukraine-war-biden-sanctions