The WTI/Brent spread is growing which is good for refiners along with the EPA cutting the ethanol blend = higher profits. Would this increase more of a demand for refined fuels which means more $$$ for the pipeline companies?
You make a good point in that if gas prices ended up being 10% lower by the end of the year, that would drive demand to a certain extent. Still not sure what drove psxp today though. Volume wasn't even all that high.