What is this?

[Kalyn]

Yeah, I kinda figured that was needed. But I will most likely have to wait until after christmas before I can afford to get that done.

Any idea's as to what this is? My first thought was rust, but it is not flakes. Whatever it is, it does not mix with gas and appears to be some kind of liquid.

I am just wondering is this from bad gas? old gas? Rust? or did someone pour something into my tank?

I know it doesn't really matter what it is, but I hate unanswered questions and want to know.