It is a stabilizer similar to the ones you put in lawn mower gas if it's old. I tried it and I think it did help with some buildup in my carbs due to the clogged filters. I also put it in my weed eater which would not run unless the choke was half on and it cleared that problem. It's not something I would use on a regular basis but it does seem to help with deposits in the carb.My 2 stroke weed eater was headed for the dumpster and now it has a new life!
