i recently purchased the cobb flex fuel kit. ive been reading about the risks of running E85 in the 2016 wrx 2.0L FA20DIT engine. i read something about it will damage the fuel pump over time, you cant run more that 30% ethanol, etc. i just want to know the pro and cons anyone has had using ethanol of any kind. my tuner tells me fuel and turbo are my next upgrades. any help is very much appreciated.