This is CO2 only and only if you count electricity as fully CO2-free, like from renewable sources. However, the total amount of electricity is way higher than a

This is CO2 only and only if you count electricity as fully CO2-free, like from renewable sources. However, the total amount of electricity is way higher than an electric car would use (up to 10x). So at a time, where coal and oil are still used to generate electricity or heat houses, these synthetic fuels would even increase the CO2 impact. Only when renewables are powering mostly everything else, this becomes interesting for uses where batteries won't do (like planes, but not for cars).