running van on vegi oil

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is it just poured straight into the tank are is it mixed with something else
and is it illegal
 
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Only method I've had dealings with is a firm who mixes 1 part rapeseed oil with 5 parts diesel - don't think you can run on it neat :confused:
And not certain where you stand with duty,either.
 
It's all to do with viscosity.
Running it neat causes it to emulsify in your fuel pump.
Dunno how true this is but I heard that one part petrol to 9 parts veg oil thins it out sufficiently.
Preheating with a system of glow plugs also reduces viscosity
My own idea :idea: which I may develope one day is to use a plate heat exchanger from a combi boiler linked in to the cooling system to preheat the oil but this would involve the use of a small tank of normal diesel to start off with, then swap over to veggie when the engine warms up a bit. The problem I am yet to get my head round is switching the return pipes to avoid cross contamination. It would have to be switched back over to the small tank before turning off the engine as it will be harder to start once the engine has cooled.
Try any of the above at your own risk!!!
Also Vosa or dti might get on your case if they catch you. I think they estimate how much fuel tax you have avoided and bill you for it.
It may invalidate your insurance if the conversion was not done by a specialist firm as is the case with lpg conversions
 
Slugbabydotcom said:
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the use of a small tank of normal diesel to start off with, then swap over to veggie when the engine warms up a bit. The problem I am yet to get my head round is switching the return pipes to avoid cross contamination. It would have to be switched back over to the small tank before turning off the engine as it will be harder to start once the engine has cooled.
Try any of the above at your own risk!!!

Years (decades!) ago,the Grey Ferguson tractor was run on a petrol/paraffin system - the fuel tank was directly above the engine (so gravity feed rather than lift pump) and the tank was split into two;the front held about 1 gallon of petrol,the rear about 8 gallons of paraffin.
You had to start the engine with petrol,and when it was warmed up,turn the taps over to run on paraffin (it couldn't start from cold on paraffin)
 
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Slugbabydotcom said:
It may invalidate your insurance if the conversion was not done by a specialist firm as is the case with lpg conversions

Say you smack up your car/van... do some serious damage to someone and your vehicle is taken away for examination... they find said fuel, check logbook 'Diesel'... just another excuse for your insurance company not to cough up at all.
 
5% white spirit to any old vegetable oil, used chip shop oil is good, smells a bit, and has to be filtered, don't forget to pay customs and excise 25p per litre though ;)
 
Eddie M said:
5% white spirit to any old vegetable oil, used chip shop oil is good, smells a bit, and has to be filtered, don't forget to pay customs and excise 25p per litre though ;)

would it do any damage to the engine
 
Say you charge your labour rate as £20 an hour....
By the time you measured it all out, mixed, filtered, got said chip fat, filled van up...
Thats an hour wasted, so you have lost £20 worth of work time,
you could have gone to petrol station filled up van, and lost 5mins- thats £2.00 worth of work... you may have paid £20 more to fill the tank, but if you think all that ball ache is worth £2.00, go for it!
 
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