Venezuelan oil is “dirty” IIRC. Apparently it’s good for bunker fuel (imagine the dirtiest sludge ever used for pushing giant ships around the ocean and you’ve got a good idea of bunker fuel), but requires significantly more refining than Saudi or US crude oil. So yay for Venezuela, but also the US would rather just replace the government with the help of that three-letter agency that shall not be named and deal with someone who went to an Ivy but is “Venezuelan enough”.