Do hybrids cost more to maintain than gas cars?

Not necessarily. Hybrids need the usual engine maintenance like oil changes, but regenerative braking often extends brake life, and many hybrid systems have proven reliable. The main cost concern is the high-voltage battery, which is covered as an emissions part generally for at least 8 years or 100,000 miles and longer in some states, and often lasts well beyond that. Follow the manufacturer's maintenance schedule and check service records when buying a used hybrid.