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Bio Diesel in sheffield

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mike142sl:
So what do you have to do to a Disco TD5 to be able to use Biodiesel then?

S188:
Well I'm no expert, but aparently my 2.25d is one of the weeker pumps around so although sticking 100% cooking oil in will probubly work fine it'd  probubly fail in the long term (could do 100's, 1000's, 10000's of miles before then).  As its my only vehicle and I do about 8000 miles a year in it I'd rather not break it, that'd spoil my day! (The last few weeks as its been off the road awaiting chassis repair.  I'm getting bord of walking or taking the train everywhere so I'm realiseing this point more than ever.)

The reliable way to run cooking oil (thicker than diesel) is to eather modify the vehicle with heated fuel lines and twin tanks (which I don't want to do) or to run a small % mixed with normal diesel so it doesn't stress the pump too much differently.  Obveously if your useing 75% diesel your not going to be saveing much money.  The other option is to modfiy the fuel so it acts like diesel.  I think RME is something thats recived this process.  

You can make RME type stuff at home but personly I have no interest myself as it'd require space to do it which I simply don't have.  Therefore the exact methods of how to do it isn't something I fully understand.

*Legal rubish* If your adding veg oil that you bough in tesco of found round the back of the chippy (and have filtered useing the space I don't have) to your car you should tell customs and pay them some tax.  I think this is about 27p/l.  Obvesouly that means if you were using free waist oil and have a suitably modifyed vehicle you can drive around totally legally for about 30p/l!  Stuff that costs about 50p from tescos however will cost nearly 80p/l with tax.  Adding 25% of that to 75% diesel at 94p/l you'd not be makeing massive saveings as it'd be 90p/l for the mix.

Theres alot of info on the net about useing all biodiesel variants in most kinds of diesel engine so your best looking yourself for your perticular engine and what it does and doesn't like without mods.  I think a Td5 should be simular to a VW TDI PD engine (the PD bit is important!) as they both run unit injectors.  My dad has a such an engine in a Caravelle and it seems to run fine on what his local farm sells in warks.  Not sure exactly what that is though.  
I've only looked into what the rover 2.25d and VW 1.6TD tolorate, as thats what I do or want to own; they both use rotary pumps with indirect injection but the VW has the stronger Bosch pump so could do stronger mixes.

Range Rover Blues:
You're obvioulsy further into this than me.  I've looked at making biodeiesel as I have the space (lockup wiht free electric) and the costs of running a home made 'still' can get expensive.  You use a type of alcohol to react the Veg oil, if you don't recover this alcohol when you seperate (evaporate) then it's very uneconomic.

Of course using waste veg oil is better for you pocket but apparently needs more work to make it fit for use, so not as free as you'd think.

I hadn't realised there were so many technicals problems with using unmodyfied Veg oil though :(  so i won't be taking the risk.

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