Graham_Wright
regular
Reged: 30/12/2002
Posts: 1025
Loc: Gloucestershire
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I have a supply of clean hydraulic oil at my disposal. Can I run my engine off it or use it for pressure jet heating?
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I'd rather be naked 
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Chrusty1
regular
Reged: 27/02/2008
Posts: 847
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Are you familiar with the phrase...."Pist'n broke"? 
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Stoaty
regular
Reged: 07/10/2004
Posts: 474
Loc: Medway
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Have a look at this Thead on another forum about Hydraulic Oil as a fuel.
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Stoaty
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Chrusty1
regular
Reged: 27/02/2008
Posts: 847
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Thanks yes I did, very interesting........I was assuming that as hydraulic oil is "non compressable" that it would creat havoc at the top of the cylinders?....Do you think?
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Clifford_Pope
regular
Reged: 28/10/2005
Posts: 788
Loc: Pembrokeshire
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I don't think "compressibility" is the problem - all oil is virtually incompressible, including diesel. It doesn't get pumped into the cylinder neat, it is atomised by the injectors and sprayed into hot air and vapourised before burning.
So the questions are:
Will it burn at all (ie not flame-retarded)?
Is it safe, in terms of pollutants?
Even if it does burn, does it have the right characteristics to be a useful fuel?
Will it be OK for the pumps and seals?
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Chrusty1
regular
Reged: 27/02/2008
Posts: 847
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Hi Clifford, yes I saw the stuff about pollution and retardents on the forum that Stoaty posted the link too. I am nowhere near being an engineer, so my knowledge of such things is very small. Incidentally, I was behind a 4x4 the other day, and I reckon he was burning reclaimed chip oil, it smelt perishing awful, like a chip shop Chelsea tractor!
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Alcyone
regular
Reged: 09/04/2008
Posts: 545
Loc: Bridgend, Wales, UK
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Um, if you do use it, and you get caught, will you still get done for not paying fuel duty?
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Stoaty
regular
Reged: 07/10/2004
Posts: 474
Loc: Medway
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It depends what it's being used for, heating, generation, or propulsion.
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Stoaty
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Chrusty1
regular
Reged: 27/02/2008
Posts: 847
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Quote:
Um, if you do use it, and you get caught, will you still get done for not paying fuel duty?
I don't know is the short answer, I know my brother buys "cooking oil" from his local super market and mixes it with the diesel for his Mitsubishi, says his engine runs sweeter, but that may be just wishful thinking on his part?
I know this is fred drift and apologies for that, but we have been considering changing our car and buying a smaller diesel engined one. Having looked at the figures, and taking into account the higher cost of diesel fuel and the extra they charge for a diesel car in the first place, it seems we will have to travel many thousands of miles just to break even over running a petrol vehicle........I am thinking it's not worth the bother??
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30boat
regular
Reged: 26/10/2001
Posts: 996
Loc: Portugal
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I think it's still worth it even with high diesel prices.I have a diesel Renault Clio and I'm getting an average of 4.6 l to every 100 km or 21,7 km per liter.Try that with a petrol engined car.Admitedly it requires a smooth driving technique ie going slower,but as I'd rather spend my money on the boat than at the pump it's well worth it.Another alternative is LPG.It's usually very much cheaper,and cleaner,than petrol.
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Chrusty1
regular
Reged: 27/02/2008
Posts: 847
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Quote:
I think it's still worth it even with high diesel prices.I have a diesel Renault Clio and I'm getting an average of 4.6 l to every 100 km or 21,7 km per liter.Try that with a petrol engined car.Admitedly it requires a smooth driving technique ie going slower,but as I'd rather spend my money on the boat than at the pump it's well worth it.Another alternative is LPG.It's usually very much cheaper,and cleaner,than petrol.
Well I am no leadfoot driver, but the cars we have been looking at in the 1.3 to 1.4 litre range have very little difference between the petrol and diesel versions, and I would need to be doing a very high mileage to make it worth while. We only do about 4k a year, at most. LPG would be a good alternative if we had a sufficient supply around here, but we don't, the only garage I know of that supplies it, is miles away, and in a direction we rarely go in. We are in a very rural area.
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eyehavit
regular
Reged: 16/02/2005
Posts: 213
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I don't know about hydraulic oil but I recall an Australian news report a couple of years back where certain unscrupulous fuel outlets were selling diesle mixed with up to 20% kero! Not good!
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stuey_two
regular
Reged: 18/11/2006
Posts: 57
Loc: South Bucks UK
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As I understand it, an individual can brew up to 2500 litres of biodiesel per year and use it tax-free for any personal use, including filling your car up. I'm not sure I would do this with a modern, high tech car but for a simple industrial diesel, as used in most boats, it should be fine - and under 70p per litre.
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