Burning Crude Glycerin Submitted by an Anonymous Greaser on Thu, 2010-10-07 17:39 Looking for info on running 2-cylinder diesel motores on crude glycerin. Is the burning of crude glycerin toxic or not? Reply to this post Burning crude glycerin is Submitted by an Anonymous Greaser on Fri, 2010-10-08 15:40 Burning crude glycerin is possible in specialized waste oil heaters but not in vehicles in my experience. To answer your toxicity question, yes, if it is not combusted at a high enough temperature then it does create a toxic gas. Good luck. reply Reply to this post Your name Comment * Location * What code is in the image? * Enter the characters shown in the image.