The ECO part will cause the cooling effect of air conditioning to decrease. In addition to limiting the power output, the ECO mode in some cars will also make the air conditioner enter the energy-saving mode, resulting in poor cooling effect of the air conditioner. For summer and winter, it is often necessary to turn on the air conditioner for cooling and heating when getting on the bus, and the ECO mode has a great influence on the air conditioning effect, so many people ignore this function.
Long-term opening of ECO is easy to produce carbon deposit. Under normal circumstances, because in ECO mode, the engine keeps low speed, and the intake and exhaust speed is slow, it can't wash away the initial "small" carbon deposits like normal driving, resulting in the formation of stubborn carbon deposits by residual oxides. For cars, there will be carbon deposits more or less. In fact, the reasons for carbon deposition are more related to the bad habits of drivers and the congestion of driving, and the carbon deposition produced in ECO mode is still very small.
Conclusion: In the final analysis, the reason why ECO models are "abandoned" by car owners is to sacrifice power for fuel consumption. Compared with driving a "weak woman" car, many people choose to drive a "tough guy" car with high fuel consumption.