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Old 10 April 2008, 15:21   #1
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Cooking oil/Diesel mix

Has anyone on here considered mixing cooking oil with diesel to cut down on fuel costs.

Are there any implications?
Would it cause engine damage?
Is it necessary to modify the engine in any way?
What would be the overall saving per litre or tank?
What would be the mix ratio?
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Old 10 April 2008, 15:25   #2
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Originally Posted by waverunner View Post
Has anyone on here considered mixing cooking oil with diesel to cut down on fuel costs.

Are there any implications?
Would it cause engine damage?
Is it necessary to modify the engine in any way?
What would be the overall saving per litre or tank?
What would be the mix ratio?
Codprawn is the expert on this subject. I am sure he will be along soon after he has collected all the old oil from his local chippy.
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Old 10 April 2008, 15:29   #3
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Originally Posted by Limey Linda View Post
Codprawn is the expert on this subject. I am sure he will be along soon after he has collected all the old oil from his local chippy.
I'm sure he will
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Old 10 April 2008, 15:40   #4
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Up to about a year ago I had a 1996(?) Citroen ZX 1.9.

Ran it on pure vegi oil no problem. I found that some types gave better economy than others.

I know it depends on the age and type of engine as to what (if any) modifications are needed (google will answer that).

I'm not sure how much it is now, but if you bought clean new oil from a food wholesale place I would of thought about 60p per litre.

Or you could go all the way and make your own bio diesel, don't think the savings are all that much for the effort needed.

Another alternative is to buy in 1000 Litre tanks of Bio diesel, from memory I think it was about 25p per litre saving.

Also I think you can use up to 1500 litres of vegie oil before you need to start paying duty.

Tim
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Old 10 April 2008, 17:31   #5
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Originally Posted by Limey Linda View Post
Codprawn is the expert on this subject. I am sure he will be along soon after he has collected all the old oil from his local chippy.
noway codders.. thats illegal isnt it ? ..
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Old 10 April 2008, 21:30   #6
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noway codders.. thats illegal isnt it ? ..
Nope you can use up to 2500 litres a year without even declaring it.

In the winter I only use about 25% - in the summer I will use 60% - many people use 100% no probs.

The price is the biggest problem. I have been buying Pura 1L bottles from Tesco for 56p per litre - it was a special offer and I bought about 600L but the offer has ended - new price is 1.07 per litre!!! The cheapest you will find anywhere now is over 90p per litre so not worth it. Only solution now is used.

Biodiesel is dying a death - they just can't supply enough oil for it - especially when all pump diesel will contain 5% bio. Even waste oil is now about 50p per litre commercially.
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Old 11 April 2008, 11:39   #7
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However not all cars are happy with a vegetarian diet.

I tried a 50/50 mix of bio-diesel/regular diesel in my 406 and all was fine for the first 30 miles. However after that the "anti-pollution" warning came on and limited the engine revs to 2500 rpm. I found this out the hard way as I was on my way to S. Devon and had the joys of pulling up Telegraph Hill at 25 mph .

It was not even possible to quickly top up with regular diesel as I'd filled the fuel tank for the journey. I simply had to burn the damn stuff off. Now I'm all for environmentally friendly measures so am not anti bio-diesel. Its just not all vehicles will like it

Just my 0.02p
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