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The short answer is no. The engine is most efficient at the RPM when maximum torque is achieved. It's easiest to explain with a picture. Power is a function of torque and RPM. Maximum torque is achieved because the engine is able to move the maximum amount of air and fuel in and out of the engine. The power continues to climb even when the torque starts ...


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No, the engine speed at which maximum fuel efficiency is obtained is different. In fact, the faster you go in any given gear the worse the resultant fuel economy will be because it takes increasingly more power to overcome the vehicle's drag forces. It worsens because the power required to overcome drag forces on a vehicle at a constant speed is ...


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This question is very multi faceted because fuel economy is such a complex topic. When a car is starting first the computer check the coolant temperature sensor to see how hot the engine is. In the memory of the computer there is a look up table that dictates how much fuel it should add for a specific temperature. This table is very conservative and the ...



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