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[Dr_X]

For what it's worth I have a 20ltr container in my garage and anything and everything petrol/oil based goes in it, I use it to light bonfires and once the petrol mixes with the oil it looses it's volatility.......

[Lazydocker]

Not sure what you mean by that but I'm totally off the grid as far as gas goes and if I had access to 2000Ltrs of that stuff a month I would be finding a way to put it through my boiler..........

I would be finding a way of putting it through the Jeep...........LD....will it burn in a diesel?

Come down and we'll try

I promise not to charge you full price for the drain

[Kevin Wood]

Viscosity is the main issue, as said. Mixing with heavier oil a possibility, although not sure I'd want to use used engine oil, even if filtered, as it will give you a lot more soot, I reckon.

Changing the jetting would also be a possibility. You just need to ensure the right rate of fuel delivery for the (fixed) amount of air. If you have that right there shouldn't be any excess vapours to cause problems. Then again, if your fuel blend is variable that might not go too well. Lambda sensor in the flue and closed loop control perhaps?

Lighting it is where the properties of the petrol will make a difference as Nigel says. You have a strong spark there and plenty of air before the fuel is delivered so hopefully it won't explode with the correct mixture. A degree of suck it and see there though.

Heating oil is apparently quite variable anyway. Depends what they have kicking around. Diesel, Kerosene, sub-standard Jet A-1, etc. or a blend thereof.

Got to be worth some experimentation with the price of heating oil.

[Lazydocker]

Heating oil quality is, as you say, highly variable

The flue has a fantastic draw. When it fires you hear the air start being pumped through for 5-10 seconds before the fuel is injected and ignited

My mix of fuel is quite variable... Obviously when I get a diesel into petrol I could try to get that into my tank

As you say... Heating oil is getting eye-wateringly expensive now so...

[Vamps]

Not sure what you mean by that but I'm totally off the grid as far as gas goes and if I had access to 2000Ltrs of that stuff a month I would be finding a way to put it through my boiler..........

I would be finding a way of putting it through the Jeep...........LD....will it burn in a diesel?

Come down and we'll try

I promise not to charge you full price for the drain

Seriously though, you must have thought about separating? cleaning? your fuel to  burn in a diesel engine, got to be better than cooking oil............I say that but the boffins must have been there....   What do you and yours do with the fuel, it must have a use somewhere......

[Lazydocker]

Not sure what you mean by that but I'm totally off the grid as far as gas goes and if I had access to 2000Ltrs of that stuff a month I would be finding a way to put it through my boiler..........

I would be finding a way of putting it through the Jeep...........LD....will it burn in a diesel?

Come down and we'll try

I promise not to charge you full price for the drain

Seriously though, you must have thought about separating? cleaning? your fuel to  burn in a diesel engine, got to be better than cooking oil............I say that but the boffins must have been there....   What do you and yours do with the fuel, it must have a use somewhere......

The waste fuel is stored according to the relevant regulations in an Environment Agency registered facility (yep, I had to jump through loads of hoops ) before collection by the only company that complies with our company requirements and getting refined again and putting back into the fuel chain

But if I can get my heating running on it then that will save me a considerable sum on my annual heating costs

[feeutfo]

Mist be a way to separate the two fuels DIY? Surely?

[05omegav6]

Mist be a way to separate the two fuels DIY? Surely?

Two possibilities spring to mind, but neither is particularly straightforward...

Either 1. Gently heat the mixture and allow the petrol vapour to evaporate in to a home made condenser and collect the run off: should be neat petrol.

Or 2. Chill the mixture to approx -30 and simply pour the petrol off.

In each case you should be left loads of diesel for the boiler and free petrolly type stuff to use up in which ever pre '86 car takes your fancy or donate to KW for the Westie

1. Is probably the best course, although extreme care should be used. If in doubt, don't heat it, but will take a lot longer to work. Thinking 30-40 degrees in a water bath, but obvoiusly try and keep the temp well below the flashpoint of petrol.

If you know any Science teachers, you might be able to blag the use of  some Bunn flasks/glass tubes/rubber hoses and bungs and a Leibig condenser for the Easter hols. Just thing of it as you own little science project

[feeutfo]

Ooooohoohoo, you wait til Kev see's that.

[Lazydocker]

Al, your theories are good but you forget to take into account the impurities and additives in modern petrol Plus trying to keep up with around 2000L per month would be impossible

If I had a pre '86 car it would already be running on the contam fuel as it is mostly petrol anyway

[Taxi_Driver]

Viscosity is the main issue, as said. Mixing with heavier oil a possibility, although not sure I'd want to use used engine oil, even if filtered, as it will give you a lot more soot, I reckon.

Changing the jetting would also be a possibility. You just need to ensure the right rate of fuel delivery for the (fixed) amount of air. If you have that right there shouldn't be any excess vapours to cause problems. Then again, if your fuel blend is variable that might not go too well. Lambda sensor in the flue and closed loop control perhaps?

Lighting it is where the properties of the petrol will make a difference as Nigel says. You have a strong spark there and plenty of air before the fuel is delivered so hopefully it won't explode with the correct mixture. A degree of suck it and see there though.

Heating oil is apparently quite variable anyway. Depends what they have kicking around. Diesel, Kerosene, sub-standard Jet A-1, etc. or a blend thereof.

Got to be worth some experimentation with the price of heating oil.

I think thats the nail/head......heating oil being thinner than diesel...and petrol ever thinner.....i guess you have a mix thats too thin at the moment......so you just need to find something to thicken it up a bit.....then give it a go 

As for old engine oil, i do know a local garage that uses an oil heater for the warmth in the car bays.....i know the owner chucks old engine oil in that......however i dont know how sooty it burns...i know the owner wouldnt care 

[05omegav6]

Excuse mobli post... Experiment small scale first. If it works then build full size int shed. ;-)

[henryd]

Viscosity is the main issue, as said. Mixing with heavier oil a possibility, although not sure I'd want to use used engine oil, even if filtered, as it will give you a lot more soot, I reckon.

Changing the jetting would also be a possibility. You just need to ensure the right rate of fuel delivery for the (fixed) amount of air. If you have that right there shouldn't be any excess vapours to cause problems. Then again, if your fuel blend is variable that might not go too well. Lambda sensor in the flue and closed loop control perhaps?

Lighting it is where the properties of the petrol will make a difference as Nigel says. You have a strong spark there and plenty of air before the fuel is delivered so hopefully it won't explode with the correct mixture. A degree of suck it and see there though.

Heating oil is apparently quite variable anyway. Depends what they have kicking around. Diesel, Kerosene, sub-standard Jet A-1, etc. or a blend thereof.

Got to be worth some experimentation with the price of heating oil.

I think thats the nail/head......heating oil being thinner than diesel...and petrol ever thinner.....i guess you have a mix thats too thin at the moment......so you just need to find something to thicken it up a bit.....then give it a go 

As for old engine oil, i do know a local garage that uses an oil heater for the warmth in the car bays.....i know the owner chucks old engine oil in that......however i dont know how sooty it burns...i know the owner wouldnt care 

I have a waste oil burning heater in my workshop which will run on diesel or oil or any mix of the two,but petrol is a definite no

[Kevin Wood]

Hmm. couple more thoughts.

1) Veggie oil is cheap and clean, and strikes me as an ideal "thickening agent".

2) Could you start the boiler on heating oil and introduce the contaminated fuel once it's established?

[albitz]

Not if its 80/20, petrol/diesel.