Wobby Posted September 7, 2005 Report Share Posted September 7, 2005 Hi, considering the above. It seems this is possible with these engines. 27.1p duty to pay. Mixed with white spirit and 50% diesel, more normal fuel in winter to allow easier starting and less diesel in summer (maybe 40%) when viscosity isn't the same problem. Probably sounds a mad idea to people here, but the fuel prices are going silly. As an example (i own my own company), my fuel bill in August for my car was £350. Thinking of giving this a try and then getting the forms to declare the oil used correctly, with a 100% declaration it adds upto around 77p per litre. Any ideas? Its just a thought. Will try it with a new fuel filter and a spare ready if all goes wrong. Although 4 new injectors might be a little costly . Not looking at additional heating as this will confuse the ECU on these complicated engines!? Link to comment Share on other sites More sharing options...
Rustynuts Posted September 8, 2005 Report Share Posted September 8, 2005 VW allow 5% Biodiesel mixed with regular Dinodiesel and still maintain warranty. However, the manual in my car states that the 2.0 ltr TDI cannot use Biodiesel for some reason. It would be interesting to hear how you get on with this. Link to comment Share on other sites More sharing options...
Wobby Posted September 8, 2005 Author Report Share Posted September 8, 2005 Its worrying me even thinking about doing it! Had a good read up on the net, but its not 100% accutate on the net. Apparently some forecourt deisel contains 5% Biodiesel. It seems a twin tank system is the way to go. I have put my milage and fuel figures into a calculator on the net and it reckons my it will take me 101 days to recover the £600 cost for the conversion to a 2 tank system. This using new veg oil and 27.1p tax, i think it might now be 29.7p tax . This includes everything you need to run on 100% vegetable oil. You install a small 22litre tank for diesel for start up and to a few mins prior to turning the engine off. It heat and filters the veg oil prior to use. But wont the heating to 90'C cause problems with the ECU? COuld 90'C affect any fuelling components? Going to look at a trial on 50/50 with some white spirit (no conversion) while the weather is still warm, then try again as it gets colder. On a full conversion you can run on filtered and treated used veg oil. Theres a Passat converted on the net (with pics!) but its a 90 or maybe a 110 bhp none PD engine so i'm not 100% sure its safe on mine with a 50/50 mix, what do you think is the worst that could happen? Link to comment Share on other sites More sharing options...
Rustynuts Posted September 8, 2005 Report Share Posted September 8, 2005 Worst case (providing the engine / ecu will still talk to each other) will probably be injector failure of some kind. Just for your information, Rix petroleum are now selling 5% biodiesel mix on their forecourts. Check their website for a local station to you. Rix Biodiesel. This will at least give you an idea of what sort of issues are known and trying it out will let you see how the car runs. After that, you're just gonna have to be a "Guinea pig". Link to comment Share on other sites More sharing options...
mulkbear Posted September 8, 2005 Report Share Posted September 8, 2005 Please Don't We had a guy try it on his Golf TDI PD (ASZ)it worked fine for 2 weeks and then after a long trip (100 mile) his, Tandam Pump went bang, All 4 injectors had enough, EGR valve starting acting up, and it had also blown a hole in the swirl pot in pistons crowns on cylinders No 1 and 4. So please Do Not Do it, if it did work well everyone would be doing it. Link to comment Share on other sites More sharing options...
mulkbear Posted September 8, 2005 Report Share Posted September 8, 2005 I think that only Rusty will under stand this but, The Problem with Using Veg oil is that the Oil cause's to much pressure in the system and the tandam pump starts to struggle with the pressure and the injectors struggle with the pressure but when the eletronic solinoid opens the injector and the injector cam forces plunger into the injector chamber it forces the oil through the injector in to the cylinder it is at to higher pressure for the coating on the piston crown and the fuel is delivered for to long it wears a hole in the swirl pot in the crown and the engine is then FUBAR'ed A good few grand down to drain ! Link to comment Share on other sites More sharing options...
Wobby Posted September 8, 2005 Author Report Share Posted September 8, 2005 The injected fuel can be in a jet not a mist, is this what you mean?? Usually caused by the veg oil not being at 90'C. I am considering a mix rather than a 2 tank system to switch to pure veg oil. You said he tried it on a GOLF PD, but what was his mix? was it heated and filtered etc? I have a funny feeling this will work, not necessarily on the PD engine though. I am 100% confident i could get a Vauxhall DTI and it would be fine. I will try this, even a basic 50/50 mix will save 25% off my fuel costs. This is at least £50 a month, usually more. Clearly not enough to replace a f**ked engine There are a lot of rumours about veg oil, some true, some not. I take on board what you say, but this Golf might have run on 100% veg oil and no white spirit. Wont work and during cold weather it wont even start. My car will be at 150k soon, business is good and i can afford to change if necessary. A proper conversion is the safe way to go, but i fancy a play first. If it breaks! I will have something to fix Link to comment Share on other sites More sharing options...
Wobby Posted September 10, 2005 Author Report Share Posted September 10, 2005 I've decided not to go for the veg oil mixing, not seeming a good idea on a PD engine. Sounds like you can get away with it on an older type engine, not on the newer common rail or PD engines. Going to build a processor and washing system to convert new vegetable oil into bio-diesel. Done correctly there will be no deterioration to the operation or longevity of the engine. I work in water treatments and specialist chemicals so most of the tests and reactions can be monitored with test equipment i already use. Going to try small batches first, see how the car runs and see how much time it takes to make the stuff! If it seems worth while i will look at sourcing used veg oil and adding the extra parts to use the used (and usually free) stuff. Then i will declare to customs and pay the duty as necessary. It will take me 3 months before i get any where near ready to put this in my tank! Thoughts anybody!? I dont need telling to go see a doctor Link to comment Share on other sites More sharing options...
mulkbear Posted September 10, 2005 Report Share Posted September 10, 2005 Why don't you buy a old Ford Escort Diesel 1.8D (1990-1999) Bosch Diesel Pump one not the rotor pump one or i you are a car snob A VW Golf 1.9 1Y (bosch Diesel pump one 1990 to 1994) Run it on veg oil mixing and perfect the mix on your (guinea pig car) then when you have the mix right and know what you are doing then run you PD on the mix If you do get a guinea pig car look for a car with a bosch deisel pump because i know first hand that bosch diesel pumps don't mined poor fuels (cherry diesel ) or deisel with a little petrol in it Link to comment Share on other sites More sharing options...
Wobby Posted September 11, 2005 Author Report Share Posted September 11, 2005 Does a Passat 1Z engine have a Bosch pump? I have a 95 Passat i could try it on. The bio diesel i am looking at making will run on my PD engine. There are lots of tests you do, inferior mixes wont make it through the tests. Not sure what you do with it then though, maybe give it to your friends... tell them its good stuff TIAN.... This bio diesel with run on your Volvo no problem, it dont matter that its petrol! Its good stuff... How much do you want? Link to comment Share on other sites More sharing options...
mulkbear Posted September 11, 2005 Report Share Posted September 11, 2005 Yes it is a bosch pump (ver510 spec) they are a strong pump i would try it on that. Link to comment Share on other sites More sharing options...
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