Heating oil is about the price as diesel fuel. Since it's basically the same thing..
Over in Lexington, a lot of the rich folks have massive oil tanks buried in their yards.
(Their homes over over-sized by 5 to 8x typically).
I've heard tales, those oil tanks are the reason that so many Lexingtonites drive diesel cars..
Click on Diesel, to see the area price..
Boston Gas Prices - Find Cheap Gas Prices in Massachusetts
It's about the same as Number #2 Heating oil..
https://en.wikipedia.org/wiki/Fuel_oil