You have a long way to go to match the prices in the Uk...currently £1.42 for diesel, which works out to about $6 a gallon.....and 2/3rds of that is tax to the government.....
Not any more, ours is 3.49.9 here today. I remember in 1973 stationed at Brawdy that we were paying 50p a liter for gas on the local economy. I miss the gas shortage in the USA, but was paying much more then also. We did not have an exchange gas station back then. Now to think about it, we didn't have much of anything except mud. They did eventually open a small exchange but it wasn't much. We still made runs to Greenham Common once a month.