Questions tagged [fuel-efficiency]

Reducing the amount of fuel used to accomplish a given amount of work, such as in a vehicle or generator.

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35 votes
3 answers
4k views

Are electric cars as environmentally friendly as we think they are?

Given the fact that the average lifetime for a car battery is 3 years and all of the batteries end up at a landfill at the end of their lifetime, how sustainable are electric cars in providing a ...
ZZZ's user avatar
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44 votes
12 answers
36k views

How effective is turning a car's engine off while standing at a traffic light?

I know some countries enforce having cars automatically shut down the engine when stopping at a traffic light. How much resources are really saved by this process? Does the car need to be ...
Ron Harlev's user avatar
17 votes
2 answers
6k views

When does using a car's start-stop system become more economical?

In this question it was asked how economic it is to turn your car's engine off when waiting for a traffic light. In the accepted answer it is said that it becomes more economical to turn it off if you ...
THelper's user avatar
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15 votes
2 answers
3k views

Propane vs. Electric vs. Heat Pump

Is there a relatively reliable way to figure out what energy source to go with when upgrading appliances? We need a new hot water heater, for starters. Our current one is propane. Options include ...
DA.'s user avatar
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8 votes
2 answers
5k views

Is it better to use propane or natural gas as a heating fuel?

Given the choice to adjust a new furnace to either propane or natural gas (?), is one less unsustainable than the other?
J. Musser's user avatar
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