I'm scared of brown goo or any goo in my gas so I recently removed my 1992 vintage tanks. I have been very fortunate to have non ethanol gas at my closest filling station but this is to end in Oct. I have never had ethanol in my tanks. Looking in my tanks revealed the kreem slosh starting to fall apart that prompted me to look inside closer with a scope. What I found was resin from the original lay up all over the inside of the tanks with large pieces broken off and floating around. This is only what I could see as there are two baffles. After much consideration I decided to go with the airdale tanks. These tanks are by no means perfect and have cons also, but I believe the are the lesser of the two evils.