[TheZMan]

Problem is the loss sending that power to your house, which is no where near 100% efficient.

[NavVet]

True, but power line transmission loss is still less than the loss of energy required to extract, refine and transport fuel. Those drill rigs, tankers, refineries and trucks etc, all use energy to get the fuel to from the ground to your tank.

[Right Wing Assault]

Problem is the loss sending that power to your house, which is no where near 100% efficient.

Electrical plants themselves are less than 50% efficient, too.

Question: Assuming it has a heater, what effect does, let's say, 20 degree weather have on mileage? How about zero degrees?