They pipe in the crude.
I forget how long it takes to move it in the pipe. But my brother said that they pipe gas @ 1000 psi, in a 36inch pipe. It actually takes days for gas to travel in the pipe to get to Duluth!!!
That is ALOT of pressure!!!
Also, if I recall correctly, most of Flint Hills Crude comes from Canada. Canada has “sour crude”, where Texas and Saudi Crude is “sweet”. The sweeter the crude, the easier and faster and cheaper to make the blend. When you drive by a refinery and get the sulfer smell, that is “sour” crude refining. It is the sulfer that makes it sour.
So, by getting Texas or Saudi oil, it is cheaper to refine, for it has less sulfer, thus being “sweeter”.
Also, he stated that Venezualan Crude is some of the sourest.