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Thread: cooking oil cheaper than diesel

  1. #1
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    cooking oil cheaper than diesel

    I have an opportunity to buy cooking oil cheaper than I can buy diesel. What is the simple additive to lower it's viscosity to best levels. I heard white spirits. anyone give good advice here.....or I might just add the oil at 20:1 or similar mix. td5 in queensland.

  2. #2
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    Mmhh! I think its a bit more complicated than just that. It looks like previous posts on this subject have been deleted. I understand there is a distilling process following the usual filtering process and Blknight.aus previously (sometime back) listed the costs associated with running waste cooking oil (or are you buying and using it new?). I believe it will ruin various seals in pumps, filters, injectors, etc so the savings you make will, in part, be consumed by these additional costs. Worth considering in the overall washup.

  3. #3
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    What will you be running it in??? (edit - missed the td5 at the end)

    If it is real unused vegetable oil and not tallow (most commercial frying oil is mainly animal fat), and you have a mechanically injected diesel, then it should start and run on straight oil throughout summer.

    Otherwise the simplest option is to convert to a twin tank system where you start on diesel and then switch to veg oil once the oil is warmed up (you need to run a heat exchanger through the oil tank).

    You could try blending it with diesel or kero but you are on your own there. I have run the isuzu on a canola/kero/bio mix that I had left over after experiments, only 20-30% canola. Ran a bit rough after a cold start but apart from that was OK.

    Bear in mind your SOx emissions and soot will be worse than either diesel or biodiesel.

  4. #4
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    cutting oil

    cut with jet A1 and check viscosity for each batch by placing a plastic bottle full in the fridge.

    about 60 % jet for a start


  5. #5
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    Plenty on the web about Td5's and Veg. oil. The consensus being - don't do it.

    The only reason for doing it would be to save a few pennies - you wont.

    Ian.

  6. #6
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    Good point mools and basically what I was getting at. Probably better financially to spend a few extra hours at work or get a part time job; money in, no mechanical headaches. I'd read earlier about what work is required (especially with used vegetable oil) and it's a bit like home brew; ya gotta love doing it.

  7. #7
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    I'd suggest you look into making biodiesel, but only if you're prepared to do it 101% properly.

    There are excise tax implications with homebrew BioD... and getting bulk methanol may be a problem.

    - I last bought it at around $225 for 205 litres, a long time ago.

  8. #8
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    A former colleague has a rusty old 4 cylinder Land Cruiser hardtop which he uses exclusively for beach or towing his boat. He has a source for new canola oil in 200 litre plastic drums which are very clearly labelled as not fit for human consumption, not to be used in food preparation, not for use in or as stock feed. The drums have a black skull and crossbones on them and he is required to return the empties. He uses the stuff straight into the old toyo. He states it starts and runs as well as it ever did on distillate. His philosophy is that if the stuff stuffs the engine, well, the car is worthless anyhow so just go to the auctions and buy another for a few hundred. He refuses to name the source stating he barely gets enough for his own use.
    URSUSMAJOR

  9. #9
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    He's a liar!!! I'll bet he gets more than enough

  10. #10
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    its brand new cooking oil not used or I would have said that, and the td5 was designed to run on almost any combustible fluid that can be injected ala low enough viscosity,(do your homework first) ffs no I don't need another job to have more money...this forum's advice is up to **** sometimes.....having the availability of the oil I was simply asking what it should be mixed with to get viscosity to good levels.....the td5 will run on it beautifully for its entire life without problems Nigel!....Mools what are you saying? youre giving completely unqualified unfounded advice...don't do it.

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