Hybrid engines can achieve significantly better fuel economy than traditional gasoline engines, often by 20% or more. This can save drivers money on fuel costs and reduce greenhouse gas emissions. There are a number of reasons why hybrid engines are more fuel-efficient than traditional gasoline engines. First, hybrid engines use a combination of gasoline and electric power, which can help to improve fuel economy. Second, hybrid engines have more efficient engines and transmissions than traditional gasoline engines. Third, hybrid engines use regenerative braking, which captures energy that would otherwise be lost during braking and uses it to recharge the battery. The combined effect of these factors can result in significant improvements in fuel economy. For example, a Toyota Prius hybrid can achieve up to 58 mpg in city driving, while a comparable gasoline-powered car can only achieve around 30 mpg.