There is quite a bit more refinery costs. But it's not just the cost to produce it, it's the fact that producing California has requires special plant configura

There is quite a bit more refinery costs. But it's not just the cost to produce it, it's the fact that producing California has requires special plant configurations. So even a surplus of gas in Texas may not affect CA supply. There are sometimes shortages of the CA approved gas, thus causing price spikes.