states it's derived from vegetable oil. I bought a few gallons before we departed around 2001 or so. It's green in color. I just did a quick look on Google and didn't find it now. May be because of ban on new 2 strokes???? I remember it was a couple of $ more than standard stuff when I got it, but I thought it would be worth it. I still have over a gallon, and by the looks of my search, I better cherish it!
I don't have any here just now, but the next time I go to the boat I will try to take a photo of the label.
Greg