Your tone to start with was arrogant. You suggest that "they keep on coming" suggesting that "they" (those you refer to as hippies) are less informed than you. Those that wish to be contentious and arrogant should also check spelling and grammar. Those that are insecure and wish to stroke their own ego actually feel the need to post proof of their degree. You did not give a link to a properly conducted trial. You gave a link to an article about someone trying to run a tractor without preheating or purging. The author admits he should do his test with a different oil. The article I posted was written by someone who is opposed to WVO and warns against it. Had you read it you might have realized this. He does admit, however, that the pitfalls can be prevented with a proper system. If the author had a commercial interest in conversion systems he would not have opined that the cost savings will be eliminated when wvo suppliers start charging for their oil. Your bald assertion that the author is biased belies his opinions and shows that you either didn't read the article or didn't understand it. I asked for an opinion about a particular MB model. You have stated your opinion about WVO and made yourself clear. Since you are so concerned about it I suggest you take it to a forum or thread dedicated to the topic of wvo so that you can enlighten those that may value your opinion on this topic.