Hey Guys....
10% is the max safe limit for stable blends according to a Citgo distributor who won't sell any blends due to long term stability problems......if the EtO picks up too much water it will separate into a gel-like component that will not mix back in!!!
Between 10% EtO and 85% EtO weird things happen thus E-85 which should be stable!!
Briggs & Straten has a test kit for about $6.00 that will let you determine the amount of EtO in gas......around here it is well below 10% to be safe!!
My $0.02 FWIW!!!
