Answers: In expressions of fuel consumed, a car idle will use less than a saloon running at highway speeds. If it's stop and go traffic, it would greatly depend on how easier said than done you accelerate. Flooring the accelerator is deeply wasteful, but basically letting the car rust forward isn't so bad. A tachometer at 800 rpm indicates the engine is consuming smaller number gasoline than a tchometer at 3000 rpm.
In terms of miles per gallon consumed, highway speeds are far more reorganized due to the gearing of the transmission.
If we're conversation about, utter a commute home, and picking between the route that is smaller quantity congested but perhaps lower speed boundary or more congested with a sophisticated speed limit, I'd turn for the less congested. This bearing, all fuel is human being used to prepel the car, a bit than burned up in stop and run traffic.
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