This intro is going to focus on diesel engines, and oil based fuels. Ethanol and other homemade fuels can be used in gasoline engines, but I have less experience/knowledge of that, and will save it for another essay.
This is not meant to be a step-by-step tutorial, but more of an introduction to and explanation of the process. There are many tutorials online. Here’s a good one (How to Make Biodiesel at Home). There’s a great online forum as well. (Biodiesel and SVO forums)
Avoid the site Journey to Forever, which is easy to stumble across when first looking for info. It is out-of-date and has quite a few errors. Eventually I’ll post my own tutorial on this site.
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