> What happens if you put E10 in an unleaded car?
>
> Using E10 will not cause immediate damage to your car, so putting a
> tank through by accident is no big deal. However, prolonged use can
> cause long-term problems because ethanol is a solvent and can cause
> degradation of rubber and plastic components, such as seals, fuel
> lines and filters.

Jeszcze czytałem, że etanol jest higroskopijny, co może powodować korozję.