At least in France, it's often said that diesel is cheaper because when the country bet on nuclear power, it had nothing to do with heavier fuels produced in re

At least in France, it's often said that diesel is cheaper because when the country bet on nuclear power, it had nothing to do with heavier fuels produced in refineries (no oil power plant)... so they lowered the taxes on diesel. They also claimed (a lot) that diesel pollutes less (I remember being in Switzerland at that time and feeling how clean the air can be without diesel!).