Oil is pumped from the ground and sent to a refinery. The magicians at the refinery break down the oil into products Americans love, gasoline, diesel, heating oil, kerosene, etc. I think it's funny that gasoline is pumped back into the ground, then back out of the ground one more time before it's pumped into cars and trucks. Seems like the price would be lower if we just left it underground. Anyway, I was lucky and finished pumping gas before the tanker finished unloading the gasoline. Everytime the tanker shows up the price at the pump goes up.