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3. Oil? Gas? LOL Where do you live? I live downtown. I do however have a wood stove in my country place.
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Manhattan, NYC. Oil heat & hot water, as is the case with most of NYC.
Oil burning on 5th Ave.? Tanker trucks at the Empire State Building?
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The Empire State building is heated with low-pressure steam, provided by ConEd steam generator plants:
"The New York City steam system is a district heating system which takes steam produced by steam generating stations and carries it under the streets of Manhattan to heat, cool, or supply power to high rise buildings and businesses."
The things a civilized city has under its streets:

What ConEd uses to generate steam:

The moar you know, my child, the moar you know

~Rev. FatherBob.