Originally Posted by xluben
I don't think our cars have a filter like that on the return. Either that or I missed it. I have been straight E85 daily driven for over 2 years now and no issues. I've had my pump housing out several times. I know other local guys (08+) that have been longer too. Definitely something I've considered though. I will keep checking.
I was hoping you'd chime in so thanks for doing so. I wish I had taken the time to understand exactly how the sump system works when I had it out. You can see through the plastic that there is a filter inside the top half that houses the pump. It looks like a rolled paper filter like what's inside the pre 08 STi filter housing. I don't know if this is filter is just used for fuel being sucked into the sump or if the return line flows through this or not.