Tsai Shing-yuan says that even if an engine meets the strictest standards when it is new, after three months of use it will begin to crack. If it is not maintained, it will be hard to maintain the standards for emissions met by the new model.
工研院機械所企劃組長蔡新源表示，目前的新車即使達到最嚴格標準，一旦引擎使用上三個月，就會開始劣化，若不保養，就無法維持新車時的排放標準。