[19bonestock88]

I think that the theory is that while E85 does demand more fuel, it's being like 105 octane, and it's cooling effect on cylinders when injected, leads to much higher compression ratios, and the gained volumetric efficiency(in both compression and timing advance) offsets the richer fuel mix... Some guys in the LSJ community have optimized their cars for E85, and claim 32-33mpg highway, and the cars carry around a roots blower for sake of making cool noises when the accelerator meets carpet...