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Originally Posted by Mohoender
However, I have seen Grae talking about diesel and alcohol and that interested me: it can't work. However, diesel engine were designed for heavy oil and they would work on any type of oil (from arachid to olive). You can put about 50% of vegetable oil in any diesel engine and 100% if you can attached some eating device on it.
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Mo I think there was some confusion here. Sorry if I didn't explain it fully.
What I was trying to get across, you do NOT burn alcohol in a diesel engine, just as you do not burn gasoline, though you can in a multi-fuel engine which also has plugs. However in refinement of biodiesel they use alcohol a solute for the hydroxide which soaponifies the veg. oil. YES you can run the oil straight with minor problems. One thing that needs to be done if your running straight VO is to have some heater for the oil in the tank, which helps with the vaporization since the vescosity is heavier than diesel. Also periodically you should (if possible) add some mineral oil to the tank. This provides lubrication to the injectors. The VO does not do the job as well as the mineral oil, causing early injector failures. I have seen figures of 1 QT per 100 gallons. If your running blended biodiesel this is not required.
Grae