The cost of Jones Act transportation is a major factor in the use of Russian Oil, over domestic oil in areas not served by pipelines from US Production - US East Coast, and US West Coast - If when we sanction Russian Oil, look for Jones Act waivers to assist these refineries in getting US domestic Oil from the US Gulf.
There are other grades that can replace - but would look for some of these refiners to make the case, both political and economic for jones act waivers and running domestic crude oil.
quotes from linked article.
The East Coast (blue bubbles, ~50 Mb/d in total) tended to import a light sweet grade of crude oil, which is likely a CPC blend exported out of the Russian port of Novorossiysk on the Black Sea. The majority of CPC blend is produced in Kazakhstan around the Caspian Sea, and then transported to Novorossiysk by the CPC pipeline operated by a consortium of governments and companies. Given its primarily Kazakh origin, trading organizations might not avoid CPC blend, depending on how its Russian linkage is perceived. A replacement for this type of crude oil in a similar quality range could come from U.S. shale production from the Permian or Bakken, but shipping to PADD 1 would require Jones Act shipping or rail, which typically results in a higher cost to the refiner. Alternatively, certain international grades from West Africa, Middle East, or the North Sea would also work.
The West Coast (green bubbles, ~92 Mb/d in total) tended to import a light-medium grade (35 API) of crude oil that was in the 0.3%-0.6% sulfur range. This would likely be the Sokol or ESPO grades that are exported out of ports in eastern Russia. A U.S. grade that would fall in that quality range includes LLS out of the Gulf of Mexico but would require Jones Act shipping and a trip through the Panama Canal. Moving to international alternatives, there are crude oils from eastern Canada (Hibernia, Terranova), the Mediterranean/Middle East region (Es Sider, Syrian Light), or West Africa (Jubilee, Nemba) that may work as alternatives.