The 2017 BYD Song DM is highly cost-effective to own, making it worth buying for budget-conscious and eco-friendly drivers. As one of the cheap hybrid cars on the market, its average running cost is approximately $0.06-$0.07 USD per kilometer (4-5 Chinese yuan), thanks to its plug-in hybrid system that prioritizes electric power for daily use, reducing fuel consumption significantly compared to gasoline-only vehicles. Long-term ownership data from a driver who logged 140,000 km shows significant savings: combining electricity costs ($0.08 USD per kWh) and fuel expenses ($1.19 USD per liter), the total cost per kilometer remains low. With used car prices starting at approximately $4,257 USD for this model, it’s an affordable and economical option for those looking to buy used cars. Routine maintenance cost is also budget-friendly, with small service items costing around $56 USD, adding to its appeal as a low-cost used hybrid car.