Alcholol is a big pain to use, milking of the oil, hard staring when cold,stinks without additive and so on, the benifits are if you have to run race gas the alcholol setup will make the motor run cooler. One bad thing about alcholol is when there is a fire most people don't see the flames so there slow reacting to the fire I dyno tested one of my motors, 11.7 to 1 comp. ratio on race gas and then on the local E85, it tested out to be E90 and the motor made one more HP and no more torque on the mix More better make a pump gas motor and run it