It's possible that the user Munit was having issues for other reasons.
I'm on my second tank with an E85 mixture and I'm not experiencing any issues like he's describing.
My plugs are only a couple thousand miles old, and I have larger injectors since I have the VF540 kit installed.
There is no reason our cars cannot supply the required fuel for a E25 mixture. That mixture is very different from running straight E85.