Is it ok or do they blow up?
I used to run a 1.8 TD 1996 Ford Mondeo and a 1996 Volvo 850 TDi estate on 30-70% (depending on how warm it was) and they both got along ok with the only problem being on 100% vege oil they didn't boost, but as soon as added diesel they where ok again.
thanks
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I seem to remember that the non pd tdi s 90 bhp and 110 bhp could manage veg oil in varying amounts .Dont try it in a pd motor it will be expensive !!!!
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The fuel system is only one part of the issue.
People tend to view the old technology MB diesels as perfect candidates for running on poor fuels, and it's true, the fuel injection systems are very robust. However good the fuel system, it doesn't protect against ring gumming and caramelisation of the oil.
See;
www.peachparts.com/shopforum/showthread.php?t=2488...6
The bottom line is that if the engine was not designed to run on manky DIY fuels, they should not be abused by their use. The meagre savings you might get will easily be swallowed up in any repair costs down the line.
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I don't understand why anyone would risk damaging their car for the sake of saving a few quid. Would you eat dog food because it's cheaper? ;-)
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Would you eat dog food because it's cheaper? ;-)
Visit any Las Vegas casino buffet and find out!
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Going back to the OP, what age of car and which VAG TDi? Older PD engines could run on Bio, but newer ones can't....
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2000 x reg 1.9 tdi 90bhp 8-00 onwards, manual says about biofuels being ok.
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Can't understand why anyone would risk running a nice car on the muck, cooking oil was designed to be cooked with, have you seen or tried to clean the cooked oil residue from the outside of a chip pan?
I suppose if you bought a diesel banger for £200 and could get away with 6 months of free used chip oil before it gummed the thing up you'd be in pocket, then rinse and repeat.
If you're paying for oil though it would take some calculating to find the in profit point.
Yet another reason not to buy a used diesel unless you know the previous owner IMO, i won't.
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A lot of myth surrounds the use of veg oil in diesels. Rudolf Diesel himself expected veg oil to be used in his engines.
I've done it for over a year - must have used about 1500 litres at least, perhaps 2,000. My last 405 has just been scrapped because it needed £s huge on the brakes and a cambelt, but the engine lives on in another vehicle. It passed the last emissions test with no issues, and used no engine oil. No ring gumming, either.
The first issue is getting good used oil, and de-watering it and filtering it to 5 microns.
The second issue is the design of the engine and the injector pump. Bosch IPs are generally very good, and you can use oil straight into all IDI Bosch IPd engines. DI engines such as the VAG TDi need a second tank (eg outboard motor fuel tank) installed in the boot, filled with derv. The engine is started and stopped on derv, and veg oil used once the engine is up to heat; this needs some plumbing and a valve to control the fuel used.
A heat-exchanger heated by coolant is used in the veg oil line to bring the oil up to about 70C.
I get about 5-10% less mileage from veg oil, and slightly less acceleration, but now that diesel is above £1.00/l, I'm enjoying free motoring. I collect my oil from a few local caterers and restaurants.
Lots of good advice and experience at vegetableoildiesel.co.uk
Edited by oldnotbold on 06/04/2009 at 14:51
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"VAG TDi need a second tank (eg outboard motor fuel tank) installed in the boot, filled with derv. The engine is started and stopped on derv, and veg oil used once the engine is up to heat; this needs some plumbing and a valve to control the fuel used." "A heat-exchanger heated by coolant is used in the veg oil line to bring the oil up to about 70C"
such modifications indicate to me the engine was never designed to use vegiie oil
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"such modifications indicate to me the engine was never designed to use vegiie oil "
Perfectly true - DI engines do not like cold veg oil in a cold engine, hence the modification of the tanks and heating the oil.
However, Elsbett veg oil conversions are TUV approved, which says something, in my opinion. www.elsbett.com
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