Here's the refining difference between the US & Europe.
Should American Vehicles go Diesel Just When the World is Running Short of it? - Column/Csaba Csere - The Steering Column/C/D Staff/Columns/Features/Car and Driver - Car And Driver
...oil refineries tend to fall into two categories: catalytic cracking and hydrocracking. Most U.S. refineries are set up for catalytic cracking, which turns each barrel of crude oil into about 50-percent gasoline, 15-percent diesel, and the remainder into jet fuel, home heating oil, heavy fuel oil, liquefied petroleum gas, asphalt, and various other products. In Europe and most of the rest of the world, refineries use a hydrocracking process, which produces more like 25-percent gasoline and 25-percent diesel from that barrel of oil...
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