Ethanol is a alcohol like Methanol and 15% the E85 is gasoline
I ant no expert but the last links I saw suggested that alcohols are different in molecular bonding and resist disolving the normal gasoline lubrication oils and so might suggest the oil will fall out of suspension to easily
The gasoline fuel has a exrra lubrication quality and hopefully could help reduce amounts of lubrication needed

I personally haven't experience of mixing E85 as it only came my local region a few weeks ago but if somebody does speak up and hopefully save me money from experiments that wont work

Balasaeater