A sharp drop in the price of crude oil has also brought down heating oil costs, potentially saving billions of dollars this winter for the estimated 6.2 million homes that use the fuel for warmth. Here, a heating-oil delivery to a home in Westwood, Mass., this past week. Gretchen Ertl for The Wall Street Journal On top of the broad savings Americans are reaping from cheaper gasoline, plummeting oil prices stand to bring residents in the Northeast billions more in savings this winter when they fill up their home heating-oil tanks. An estimated 6.2 million U.S. homes rely on heating oil for seasonal warmth, the vast majority in the Northeast. The region—stretching from Maryland to Maine—accounts for about 87% of the heating fuel’s use, according to federal data. The fuel is delivered by truck and pumped into storage tanks, which are often in the basement. Heating a house […]