[Richard in Anaheim CA]

Richard,

I assume that the E85 gas dissolved the residue from the old gas that was left in the tank; however, that wouldn’t take care of any rust in the tank. I suppose you could also use 5 gallons of something like Rust911 for the rust.

David Serrano

Yes, that would be more effective but I was looking for a quick cheap way to dissolve the gunk from old CA gas. Some of the rust would be released with the gunk and I rinsed the tank with water and air dried.