I get the state-to-state tax differences. What's got me head scratching is that gas is ~75 cents more per gallon right in the big hairy middle of the Permian Basin, within 50 miles of the Alon refinery than it is here in DFW. Same state. Ostensibly far more supply there. Ostensibly far shorter transportation. Ostensibly less demand. Makes no sense. What's the factor(s) I'm missing?