I used it occasionally in my 2 strokes and my 4 stroke lawn tractor everything went bad this summer I had to replace all of the rubber holes because they were brittle and crumbled in my hand. That is what E-10 fuel does , I replaced all the rubber fuel line hoses on my 2002 pickup and injector seals because of same reason. Now that I'm using the Lucas injector cleaner & sta-bil stabilizer I have not had any problems so far.

My take on all this so far is this if the E-10 was all that great why is it banded for use in airplane's ther is no ethanol in aircraft fuel anywhere.
They say all vehicals built after 2002 e-10 is safe I find that hard to believe so I just add a little stuff to all my gas and I'm good so far.

 

my 2010 with 18,000 running the same

 

Could be Back pressure from your Resonator those go bad real fast, or bad ignition coils/plugs/wires to cause a misfire.

 

I think i have the same issue. When I’m in park (auto) it sometimes idles high then low (below 500rpm and shutters) then its fine. Then after being in reverse to drive it will idle below 500 then sometimes stall. While driving if I accelerate, instead of down shifting from let’s say 4th to 2nd it will go to 3rd then 2nd. It never used to do that. Or when I push on the gas the rpms will drop down to 500 then jump back up. So I think it’s kind of the same thing. Ill clean the maf sensor before I take it into the dealer. I’m at 31k