Oil is dirty, but it is slippery. Dirty oil will stain your cloths but, will burn and release energy. DIRTY oil will make your car go, even whacko military minded environment preacher's cars. Dirty oil don't care whose $12,000,000 turbo-jet is powered to the next environmental meeting. Dirty oil looks green to me. Any environmental whackos have stock in Dirty Conoco Oil? Vikkitraitor, do you own Dirty Oil Stock? Dirty oil emits CO2 when burned, just like you do. Humans emit CO2. That is the rub. All animals emit CO2 and that is why the UN wants to eliminate most of them, people, not animals? Did I mention how dirty oil is? Buy a bicycle and shut up.