BIO FUEL?

I saw this tank that is for collecting sap from tapped Maple trees. It has a sign on the side of the tank that you would see on trucks that has a code that tells what kind of material they are hauling. I thought it would be funny to post a photo with photo of the tank and call it "Bio Fuel?". Well I guess the joke is on me, I looked up the code 1170 and guess what it is, Ethenol...bio fuel.