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I've been told a typical 3 litre V-6 uses about 0.36 gallons per hour at idle. I pencil this out real quick and am shocked to learn that that this is a total waste of 15 horsepowers. What were the engineers thinking?.36 gph1 h equals 3600 seconds.36 / 3600 = 36/100 /36 /100 = 1/10000 = 10e-4so .36 gph equals 1/10000 gal per second..0001 gallons equals 13.1 k Joules.0001 gal/s equals 13.1 kW equals 4/3 * 13.1 horsepower ~ 17 horsepower waste at idlemultiplying by 30% gasoline to mechanical energy conversionengine efficiency that is still over 5 horse powers of wasted energy.Why so wasteful?How much of idle waste does a typical alternator recapture?
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