When I lived in New England, it seemed that heating oil was cheaper than gasoline. I can see if the new EPA regs require reduction in sulfur how that might change.
But there was another reason the cost of heating oil was lessened: Congress passed a law each year to give a reduction in heating oil costs. this was designed to favor the liberal northeast.
Since you seem to be able to manipulate google pretty good, can you find out what is its status? Are we still subsidizing Yankees?
The only thing close to that I am aware of was the creation of the NE Heating Fuel Reserve to make sure the area had adequate supply when pipeline or weather created supply disruptions.
It was never used until 2012 Hurricane Sandy.
http://energy.gov/fe/services/petroleum-reserves/heating-oil-reserve
There are some low income heating subsidies, but that doesn't help lower the general price of fuel. It only helps pay the actual cost for a select group of people. If anything, it raises them by keeping the demand up for costly fuel oil.