A friend linked me to this post over on FT-86 club. I guess they are having a big E85 eating fuel filters scare right now:
I'm at 14,000 miles and over 1 year on straight E85 (E70) with no observed side effects. The BRZ/FRS fuel sump system doesn't look exactly like the one in the LGT & 08+ WRX/STi but its pretty similar in that the filter lives inside a sealed part of the pump housing. Its kind of annoying that is part cannot be checked or replaced (to my knowledge) without replacing the whole housing.
I suspect this incident is due to something other than E85 itself. I think it might be bad fuel or additives and there isn't much data besides one guy's pictures.
Has anyone with the plastic sump style pump housing ran issues any issues that could be related to E85?
I'm swapping in a Walbro 405 soon so I'll be inspecting my sump but I thought I see if anyone else has any feedback on this.