Engine Oil hybrid vehicle VS Plug-in hybrid vehicle, which one is truly "worth it"?

A Engine Oil hybrid vehicle uses both a gas engine and a small electric motor. 

A plug-in hybrid electric vehicle is  equipped with a rechargeable battery pack that can be directly replenished via a charging cable plugged into an external electric power source, in addition to charging internally by its on-board internal combustion engine-powered generator. 

A regular hybrid car that is fuel-efficient, stable, and does not require charging seems to be the perfect choice.

Although hybrid cars are more fuel-efficient than gasoline versions, the saved fuel costs are insignificant compared to the high price difference of purchasing a car. Although the fuel consumption per 100 kilometers has decreased from 5.81L to 4.2L, the price difference of 8000 yuan will take nearly 6 years to be compensated for through the saved fuel costs. If considering the limited replacement cycle or mileage, this price difference may never be able to 'recoup'.

Plug-in hybrid vehicles not only rely on electric power for daily commuting, achieving zero fuel consumption, but also far exceed regular hybrid vehicles in terms of power response and driving experience. 0-100 km/h acceleration takes just over 7 seconds, with ample power and a more relaxed and enjoyable driving experience.

Even without a home charging station, plug-in hybrid vehicles still have more advantages than gasoline hybrid vehicles. Plug-in hybrid vehicles can also be used as gasoline vehicles without charging, and fuel consumption is not high. More importantly, the flexibility of plug-in hybrid vehicles allows owners to choose the charging method according to their actual situation, whether it is charging along the way or using charging stations in public places, which can replenish the vehicle's power. There are 2 types plug-in hybrid vehicles, one is AC charging plug hybrid vehicles and the other one is DC charging plug hybrid vehicles. 

There is no need to worry too much about battery degradation in plug-in hybrid vehicles. Even if the battery performance deteriorates in a few years, plug-in hybrid vehicles can still be used as high-end oil hybrid vehicles, with the oil electric dual drive system as a guarantee. However, hybrid vehicles lack such flexibility and upgrade space.