ETHANOL is an alternative to petrol and can be combined with regular unleaded fuel in any concentration, up to 100% pure ethanol. In the UK, ethanol accounts for up to 5% of the fuel you’ll buy from a petrol station, but there are plans to increase this to 10%.
Ethanol acts as a solvent, damaging certain items and causing blockages
This is potentially bad news for older vehicles, as ethanol acts as a solvent, damaging certain items and causing blockages. Most cars built after 2002 will probably be OK.
As ethanol has a lower energy content than petrol, an extra third is required to travel the same distance as regular petrol. That said, ethanol does improve engine efficiency and increase performance.