Re: Mixing vegetable oil with diesel

Posted by Ludwig on April 26, 2003 at 08:15:28 from (151.203.116.184):

In Reply to: Mixing vegetable oil with diesel posted by fa on April 26, 2003 at 07:48:55:

Rudolf Diesel was the first one I think. As far as I know his intention for the diesel engine was to run on vegetable oil to provide farmers with they're own source of fuel.
Gotta heat the veggie oil is the only thing especially if its cool out. So what most systems will do is start on diesel and run until warm and switch over. Switch back when shutting down. The separate tank for the veggie oil is usually heated off of engine coolant.
Chemically diesel and vegetable oil are very similar. Just more carbons in the chain in veggie oil. You can break the carbon chains with metanol and lye, then you get bio-diesel. Using veggie oil or bio-diesel is supposed to be much cleaner than dino-diesel though you lose a little power.

Why? Well you can get used veggie oil, usually refered to as "wasted" for free from restaurants. Strain out the particulate and you've got fuel. There was an article in Homepower magazine recently where a guy was making bio-diesel for his Mercedes diesel car for like $0.85 a gallon. If he had the kit to run straight veggie oil it'd be cheaper than that.
The caveat of course is that the veggie based fuel will corrode rubber seals and hoses so you need to upgrade all of that first.
I'll post a link thats pretty complete.

• Veggie oil as diesel fuel

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