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View Full Version : Pro's and cons of blending vegetable oil with diesel fuel.



AusKiwi
9th July 2017, 04:10 PM
I live in a townhouse and it isn't practical to be processing waste oil into biodiesel because of fumes etc.
Is it a practical solution, if I can get some waste oil free or cheap, to filter it and then add it to regular diesel say in the ratio of 10-20% as a fuel extender. I have heard of marine diesel users adding olive oil as an additive to their diesel fuel, and getting better fuel economy, but this is taking it a step further, actually burning the raw vege oil in my car, but not to the extent that it will clog injectors etc.

I already use several aftermarket diesel additives which are supposed to make the fuel burn more cleanly, so I would continue to use these, and hopefully I would get away with adding a few litres of filtered waste oil per fill without causing damage to the engine. I have a 2003 Citroen C5 with a 2.0 litre common rail turbodiesel engine.

If anyone has any experience with this, or an opinion on whether it is possible or advisable, please comment.

Also, I am on the Gold Coast, so if someone knows of an oil source in my area that would be handy to know too.
As my needs would not be great, perhaps I can join forces with a local if I go ahead with this.
Of course, if someone is making biodiesel on the Gold Coast, I'd be happy to pay a reasonable price for some ready made biodiesel.
I was contemplating driving to Brisbane for it at one point, but it didn't make sense cost-wise as I'd be burning more than I'd be saving,
just to get there. If I could pick some up locally, I'd be much more interested in taking some biodiesel off the hands of a local for an agreed price.

Tony From West Oz
10th July 2017, 12:50 PM
I live in a townhouse and it isn't practical to be processing waste oil into biodiesel because of fumes etc.
Is it a practical solution, if I can get some waste oil free or cheap, to filter it and then add it to regular diesel say in the ratio of 10-20% as a fuel extender. I have heard of marine diesel users adding olive oil as an additive to their diesel fuel, and getting better fuel economy, but this is taking it a step further, actually burning the raw vege oil in my car, but not to the extent that it will clog injectors etc. This is exactly the same thing as you describe using olive oil


I already use several aftermarket diesel additives which are supposed to make the fuel burn more cleanly, so I would continue to use these, and hopefully I would get away with adding a few litres of filtered waste oil per fill without causing damage to the engine. I have a 2003 Citroen C5 with a 2.0 litre common rail turbodiesel engine. Most aftermarket fuel additives are an expensive purchase with no proven benefits


If anyone has any experience with this, or an opinion on whether it is possible or advisable, please comment.
If you search the site for 'common rail' you may find others using vegetable oil fuel.



Also, I am on the Gold Coast, so if someone knows of an oil source in my area that would be handy to know too.
As my needs would not be great, perhaps I can join forces with a local if I go ahead with this. Where do you plan to store the unfiltered oil, filter it and store the filtered oil? If you are in a townhouse, you may not have the room to store much oil. How much oil would you use per month? How much oil do you have room to store? (under cover so it does not get water in it). How do you plan to blend the oil / fuel to ensure a consistent blend?

Oil filtering is easier with long term settling of the oil. Filtering options include cartridge filters, bag filters and even centrifuging the oil.
Of course, if someone is making biodiesel on the Gold Coast, I'd be happy to pay a reasonable price for some ready made biodiesel.
I was contemplating driving to Brisbane for it at one point, but it didn't make sense cost-wise as I'd be burning more than I'd be saving,
just to get there. If I could pick some up locally, I'd be much more interested in taking some biodiesel off the hands of a local for an agreed price.