>designed to process heavy crude Yes, because historically, that's what the US produced. The refining and transport infrastructure takes time to modify and cat

>designed to process heavy crude Yes, because historically, that's what the US produced. The refining and transport infrastructure takes time to modify and catch up to the new markets, (especially after Warren Buffet and Obama's back room deals to the benefit Union Pacific RR). California is set up for lighter crude because it has even higher costs and stricter environmental regs than the US standard, but the same premise applies. It's still cheaper for them to import the more expensive light/sweet than to refine heavy/sour from LA or Mexico or Colorado.