Yes, you can add Techron to E85 fuel. In fact, it is recommended that you do so in order to maximize performance and reduce wear on the engine. The combination of Techron and E85 provides benefits such as better combustion efficiency, improved power output, reduced carbon deposits on valves, injectors and piston tops, as well as enhanced fuel economy. When using this combination of fuels it is important to use a higher octane rating than what would be required for traditional gasoline since ethanol has a lower octane rating than petrol does. Furthermore, when adding Techron to your tank with E85 you should always fill up completely before continuing your trip in order to ensure the proper mixing ratio between the two fuels. Following these tips will help extend the life of your vehicle by reducing wear on its components while also increasing overall engine performance!