I've done some poking around and found estimated mileage drops from using fuel with ethanol added of anywhere from 2% to 30%. I'm sure a number of people here have done semi-rigorous testing, and I think it would be good to have a thread where people post their findings so we can aggregate the results and hopefully identify some trends.
Pleast post your findings here, and if possible include:
- Vehicle type
- Detailed engine information
- Percent ethanol used
- ABA test results
- Description of your test process