E-fuels, also known as synthetic fuels, are liquid fuels produced from renewable energy sources such as wind or solar energy.

These fuels have similar chemical properties to fossil fuels and can therefore be used in conventional combustion engines without the need for modifications to the vehicle.

However, the production of e-fuels requires a lot of energy, which must be generated from renewable sources in order to have a positive environmental impact. There are different types of e-fuels (gasoline, diesel, kerosene, naphtha, methanol) that can be produced from different feedstocks, including CO₂ capture and utilization.