Originally Posted by BosnianLanos

E85=Bad. Hess stations (the one near my house anyway) have gasoline with 10% ethanol. Avoid them. The alcohol is aggressive and prolonged use will damage rubber fuel seals and cause bad leaks in the long run. E85 will create more power in high-compression engines (Koenigsegg CCXR), but in gas-only engines, the compression ratio isn't high enough to use the E85 efficiently and you will experience 10% worse gas mileage.