I tried running my car on excrement. I was pooping in a bucket for weeks. Then i remember taking the bucket outside to my car. I remember the smell as I was scooping it out with my bare hands and trying to get it in the tank. I got so hot doing it that I drank the fluid in the bucket. It tasted so foul and made me sweat so I sweared some over my face to cool me down. The neighbours were horrified. The car didnt start though.