E85 will only be worth it NA if you rebuild for much high compression ratios over stock. If a rebuild is not in your future then its boost or bust. E85 is completely useable in our cars with injector and fuel pump swap. Talk to Phunk here on the forum. He is an amazing resource...also has a TT E85 370z that is at 520+whp that has been run for 20k miles atleast with no problems. Also every Sheetz gas station in my area is being rebuilt with E85 pumps so I get the feeling this will be the future
