Lets argue about what it is or isn't for ten pages. What the heck difference does it make what it is? Get t out, clean it up put good gas in it and rock the heck on. Nobody here has a internet analyzer that can reach through the computer and tell you what it is. It's obviously something that ain't supposed to be there.....although somebody here will probably argue with THAT. I am not being a smartass, I am just telling you that around here, people will argue about anydamnthing under the sun. Best thing to do is just get the stuff out......whatever it is and clean it up. Talking about here is just wasting time that could be spent doing the job.