What are the drawbacks of China VI engines?

[DeJayce]

China VI engines require the use of China VI gasoline, which contains 10% ethanol. Since ethanol has a lower calorific value than gasoline, this leads to a decrease in engine power and an increase in fuel consumption when using China VI gasoline. More details are as follows: 1. Currently, only GAC's 4A15J1 engine and SAIC's 15E4E engine from domestic manufacturers have been included in the China VI standard list. 2. China VI engines perform well in terms of fuel economy and reducing exhaust emissions, but the current technical requirements for China VI engines are relatively high. Few domestic brands have independently developed such engines, and most are equipped in imported brand models.