General Motors' decision to introduce its mild hybrid system, eAssist, in a big way proves that automakers can use a variety of technologies in the quest to achieve a corporate average fuel economy of 54.5 mpg by the 2025 model year.
Not every advance has to be a moonshot like the Chevy Volt.
What's key is that a mild hybrid system costs about a quarter of what a conventional full hybrid system costs but can deliver about half the added fuel savings.
Incremental advancements in engine technology and weight-saving techniques mean that an automaker doesn't need a fleet of EVs to achieve major gains in fuel economy.
Instead you have a product people want to buy that improves mileage. GM doesn't call eAssist a hybrid. Ultimately, no one cares about the name, only the results and the price.