DeepBass9 724 Posted July 10, 2015 Share Posted July 10, 2015 Seeing as biodiesel can't be bought anywhere for whatever reason I'm going to try to DIY. This will be to run my generator on, which is a lister type slow speed engine. I should be able to get hold of used vegetable oil, so I'll try with that. As far as I can figure there are three routes you can go. First is to mix in vegetable oil with diesel and run on that. Various sites on the web say up to 50:50 is fine. Just filter the oil first. Second is to run the engine directly on the vegetable oil. This seems relatively easy to do. You need to have a separate tank for the vegetable oil and a valve to switch between diesel and the vegetable oil. The vegetable oil needs top be pre heated to make it thinner, so to do that I will run a copper coil in the fuel line around something hot on the engine. Either the radiator pipe or the exhaust, I'll see what works. Then basically you start the engine on normal diesel, when it is at operating temperature you switch to the vegetable oil, and before you shut down you run on diesel for a bit to get the last vege oil out of the system. You just need to filter the oil first to get the fish and chips out. As described here : http://www.ehow.com/how_7499370_run-diesel-waste-oil.html The third route is a bit more complex, you chemically separate the vege oil into diesel and glycerine, which is not a complicted process apparently. You then have a diesel substitute that you can run any engine on with no modifications. So to start with, I will try no 1: I made hamburgers and chips last night so have about 1l of used sunflower oil. I'll filter it, throw in the diesel tank and start that sucker up. That will probably be about 20% vege oil. I'll then have a look at modifying the engine so it can run directly on vege oil. Watch this space. SOLARWIND 1 Quote Link to post Share on other sites
superdiy 533 Posted July 10, 2015 Share Posted July 10, 2015 You just need to filter the oil first to get the fish and chips out. Made my Friday. Quote Link to post Share on other sites
DeepBass9 724 Posted July 10, 2015 Author Share Posted July 10, 2015 Quite a lot of info here : https://en.wikipedia.org/wiki/Vegetable_oil_fuel Quote Link to post Share on other sites
DeepBass9 724 Posted July 10, 2015 Author Share Posted July 10, 2015 Quick lunchtime experiment: Filtered the oil from last nights chips, got about 600ml. Mix some with some diesel to check that it dissolves (dish on the left, about 50-50 diesel and oil). So that looks fine, so in the diesel tank it goes. Probably about a 10% vege oil, diesel mix. I'll run the genny tonight for a bit, can't see any harm being done at such a low concentration. So did I make free diesel, or free chip oil? Quote Link to post Share on other sites
Pony 1 Posted July 10, 2015 Share Posted July 10, 2015 Looks Fantastic. Dont personally know much.My Old man always told me tractors can run on sunflower oil. Please keep us updated. Sincerely P Quote Link to post Share on other sites
DeepBass9 724 Posted July 10, 2015 Author Share Posted July 10, 2015 Thanks, the next stage of the project is to frequent all of the local bars and restaurants and find out if I can get used oil for free or very cheap. Its a tough job, but someone has to do it..... Running the generator now on my oil blend. Seems to work...... Quote Link to post Share on other sites
Chris Hobson 1,775 Posted July 10, 2015 Share Posted July 10, 2015 Hi Deep Bass9/ You must be excited with your progress - just watch your injector and injector pump. With a Lister one has a wide tolerance so you should not run into any problems. Quote Link to post Share on other sites
Guest Posted August 25, 2015 Share Posted August 25, 2015 I am aware of 2 places in Cape Town selling biodiesel. Used both. If there is an interested, I can find them again. Quote Link to post Share on other sites
Energy-Jason 441 Posted September 7, 2015 Share Posted September 7, 2015 How is the gen ? Still on veg oil? E Quote Link to post Share on other sites
KLEVA 156 Posted April 9, 2016 Share Posted April 9, 2016 Energy, I think it blew up his farm/internet - he hasn't responded yet Quote Link to post Share on other sites
DeepBass9 724 Posted April 11, 2016 Author Share Posted April 11, 2016 Sorry, I don't make enough slap chips for it be viable..... Chris Hobson 1 Quote Link to post Share on other sites
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