Does this advice apply to all cars?
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Accelerating – Higher RPMs consumes more gas, keeping RPMs lower consumes less gas. Engines are not 100% efficient, so some of the energy produced is wasted as heat or to drive other systems in the vehicle (Such as AC, water pump, or cooling system). Higher RPMs are also associated with traveling faster in general, so more wind resistance.
Braking – Also ties into engine RPMs, as your engine is still running, if you brake suddenly, you are likely to have been running at a average higher RPM for maintaining speed instead of a lower RPM as you brake gently or “coast” to a stop.
For electric vehicles, there is also regenerative braking.
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