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1 vote

How much energy would it save to park cars in the shade in summer?

Not very much. The parts of interest to cool are the seats and the air inside the car. If the cabin is three meters long, 1.5 meters wide and 1.5 meters high, then there's 6.75 cubic meters of air. At ...
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2 votes

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

My 95 Accord MT went from ~28.5mpg to ~32mpg easily from mostly shutting off at stoplights, even as little as 7sec or more. About 10%-12% increase in mpg. I also use engine breaking and conserve ...
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