I did add Sta-Bil; that's why I said I added fuel stabilizer.
And as far as "topping it off". It's a 41 year old tank. I imagine it probably already has rust in it. That's what I rely on my fuel filters for as well.
And I remember a while back you sent me a pic of a tank that you had cut open.
How rusty was that one? I'm just curious to be curious.