[mylife]

Who is buying this heavy sulfur crude?

[ASA Vet]

CITGO is majority-owned by PDVSA, a state-owned company of the Venezuelan government.

[DUMBGRUNT]

The Iranian tankers are carrying much-needed fuel for Venezuela, which has experienced severe shortfalls due to American sanctions.

Venezuela imports because of deferred maintenance issues and sharks with lasers sabotaging vital components.

[LaMudBug]

Who is buying this heavy sulfur crude?

Heavy, suldur crude oil is the type of oil found in V as compared to the light crude found in the US and requires a special kind of processing which is what CITGO has the refinery in V to do.

[Wonder Warthog]

"Who is buying this heavy sulfur crude?"

I think the tankers contain gasoline, not crude.

Venezuela's crude is already very high sulfur and they have plenty of it. What they lack is refining capacity, previously depending on US refineries. But with sanctions, and the much higher availability of low-sulfur "sweet" crude from fracking, US refineries have mostly switched away from the difficult-to-refine Venezuelan crudes.