Several questions come to mind. Did you put needle bearings in the rod? What oil to fuel ratio are you using? I am also curious about lowering the C/R.

Borna, the oil's that work with methanol will work fine with ethanol. I understand there are some very fine oils available in Europe that we don't have access to here in the states. The best we have available is the oil that Coopers Fuels sells. PM Brian and he can give you a price and shipping info. I was running mine with Klotz when I was experimenting with Ethanol. (The Klotz that has both synthetic and castor, I forget the number)