Hard to believe this thread has been around just a few days shy of 1 year, and since then I have worked on many e-85 cars, researched lots of info about e-85, and read lots of other web site discussions and have found lots of opinions and mis-information, as well as some good info from experienced people in the real world, and also from tech experts in this field.
Last year at SEMA I met with tech experts from Stabil and Joe Gibbs which are both responsible for development their respective gasoline and e-85 additives.
For years I have always used a gasoline stabilizer in my car that are driven little, and also in my e-85 cars since they were converted and never experienced any "goo", rust deposits or other issues traced to the fuel.
I just returned from SEMA where I had the opportunity to meet with the person in charge of the tech lab at Joe Gibbs which developed their product "Driven", which is fuel additive to prevent corrosion and clean deposits.
We discussed info I had collected over the past months of internet comments and opinions of which most was of no value, and some erroneous, and completely wrong as pertaining to possible causes of different issues.
He did state that the Driven product has specific additives, different than internet sources named, which have proven to be very efficitive in the gasoline/alcohol e-85 mixture preventing corroding or leaving deposits.
The "mating" of gasoline and alcohol also has many variables like quality of the gasoline, different additives in the gasoline which may react to the alcohol?
The rust-like deposits and goo are not a fuel issue, but probably something else going on in the system?
In my 3+ years with e-85 cars using Driven and Stabil additives, we have not any experienced unusual fuel or deposit issues. Will others, possibly?