Biodiesel.Will this work?

Depends on what you call 'filtered'. Do you know what it costs to o/h a fuel pump !

why dont you go to the fruoterer and buy all the old vegetables they give away to feed the chooks etc you could put them in the kitchen whizz with a bottle of vegetable oil canola is ok mix all up and shove in tank lettuce leaves r not much good nor r parsnips most other veges r OK.

I have been doing some research and slowly learning.
Just search the biodiesel sites, a wealth of information out there.

From what I can work out, running straight vege oil is not safe.
1. When vege oils burn, or more correctly come into contact with high temperatures, they form longer chains of molecules, which can carbonise. One spot this can happen is at the injectors, so blocked injectors.
2. There is a wide variation in vege oils, some are worse than others.

The biodiesel manufacturing process stops this from happening.
They use an alkali to pull the glycerine out of the oil.
The level of glycerine is called the iodine level, since iodine can be mixed with a sample of the vege oil and the amount absorbed indicates the problem.

So some vege oil may be OK, but 100% definitely not.

Now, being new to this biodiesel business, I am open to correction.

From what I understand the process called transesterification is to remove the glycerine from the vegie oil to produce the Bio diesel . Apart from filtering and unsuring correct PH and water content thats about it. The glycerine will cause the problem with carbonisation as mentioned above.

Dave L.

I thought that "blended diesel" referred to a blend of petrodiesel and biodiesel, not petrodiesel and SVO (Straight Vegetable Oil). SVO is not recommended for some pumps (CAV Rotodiesel is one I know of) unless it is pre-heated. This means that you start on diesel, switch over to SVO when it has warmed up, then switch back to diesel before shutting down so that there is diesel in the pump when it next starts. I don't know the effects of a blend of diesel and SVO but I would do a whole lot of research before trying it.

Stephen.

Check out this site - apparently, if veggie oil is (pre)heated to lower its viscosity, it works fine

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regards
Terry

Peter,

I'm surprised your forum search didn't show up my contributions on this topic before.

Yes it is possible.

There are a wealth of good links with a few starting points being:

www.ravenfamily.org/andyg/vegoil.htm
www.greasecar.com/
Site Link
www.frybrid.com/
www.biofuelsforum.com/ go to the WVO section

Adding brand new supermarket vegetable oil - available on special at my local supermarket for $1 litre - at a blend of up to 25% oil requires no modification, no concern for clogged injectors or rings, will remove the diesel smell from you exhaust, extend your use of fossil fuels, give you a great talking point, run your engine quieter, minimise the black smoke. You will also be breaking ATO laws by blending an excisable fuel and a non excisable fuel. To get around the tax laws, you run a two tank system where you start up and shut down on dino diesel and when the engine is warm, you switch to heated full strength vege oil.

A diesel can run 100% vege oil new or used without problem as long as it is viscous enough to be injected properly otherwise you may/will have problems with coking injectors and rings. You reduce the viscosity by either heat - at 70°C canola oil reaches a viscosity similar to diesel - or by thinning it.

You can heat it either electrically, or the favoured method of using a heat exchanger off the coolant system. To thin it people use dino diesel, kerosene and in the US they use unleaded.
Adding even a few litres to a tank full of dino diesel will increase the lubricosity of the dino diesel substantially for the benefit of your pump.

Filtering is critical. Vege oil users can buy 5 micron sock type filters that are adequate. Supermarket oil does not need filtering, just pour it in.
Heating, blending etc., can be avoided as per the above post, by converting the vege oil to biodiesel, which several forum users are reporting on.
Using vege oil, new or used, is NOT biodiesel.
Some diesels, notably rotary Lucas pumps are not suited to vege oil.
The jury is out as far as I know on VO for high pressure common rail engines. It would simply be a matter of viscosity through the pump and injectors.

Caveat emptor. Do your own research. Try it once with new supermarket oil. It's only kinky the first time.

Regards
Tim