The New York Times has an article about the affect of fuel consumption brought on by foreign government subsides. Iran, Venezuela, Saudi Arabia, Mexico, India and China all heavily subsidize the price of petroleum products. These governments fearful of inflation, and civil unrest are heavily subsidizing energy prices, particularly for diesel fuel. China alone spends $40B a year on subsidies. That would not be possible if it were not for the fact that China has such a huge trade surplus with the US.
I doubt anyone calculated the affects of these subsidies when the US was agreeing to lop-sided trade agreements giving away trade advantages at the expense of American interests. Fuel Subsidies Overseas Take a Toll on U.S.