Convince my friend he will blow up his car with Veg oil

[TW]Fox

[TW]Fox

[TW]Fox

Man of Honour
Joined
17 Oct 2002
Posts
160,229
Hello good people of OcUK.

My friend thinks its well worth using veg oil mixed with diesel fuel in his remapped BMW 330d. He doesn't drive high mileage, so the savings wont be huge.

In this thread you will chose to do one of three things:

a) Convince my friend this is a silly idea and will seriously damage his 330d
b) Make me look stupid for doubting his plan by showering the thread with fact to show actually, its fine
c) Click the back button whilst wondering why this thread exists.

I'll start with an extract from some random website!

Running these direct injection engines, unmodified, on vegetable oil also poses serious risks; not only to the pump (which has effectively been replaced by a very high pressure tank and pump serving a common rail to the injectors), but to the engine itself; every time the engine is cold started, some of the cold, viscous vegetable oil will not fully combust, and will begin to stick to the cylinder walls, in the form of sticky black carbon deposits (similar to burnt, caramelised sugar), causing wear to the piston rings. This causes vegetable oil to seep down the sides of the pistons into the oil sump, causing a loss of compression and oil contamination, and reducing the lubricating properties of the engine oil by diluting it. The problem gradually gets worse, a loss of compression resulting in a more incomplete combustion, which results in more seepage, more wear, eventually resulting in complete and usually irreparable engine failure. This process is known as ‘ring gumming’.
Click to expand...
 
His injectors won't last long, no idea how much they are to replace.

Plus it's nasty stuff once it starts diluting your engine oil
 
Just hit him!

Or you could point out how modern fuel injectors can't take Veg oil, and then point out how much BMW will charge for a set (the price is on the options list isn't it? :D).
 
i wouldnt run it in a 330d, if u can afford a nice 330d u can afford the d to go in it, but my mate runs veg oil in his tunned 306tdi no problem.
 
It's true. Why even bother with some people, end of the day they will try it. That's like me buying a £50k Ferrari and telling people I'm going to run it off Urine. Or some other liquid substance.

We all know it's wrong. But always curious to see the outcome.

End of the day, if BMW say it's suitible to run the car of Veg Oil, by all means do it.

But thinking and doing it yourself? Say bye bye.
 
Let him learn the hard way tbh

Although talking and serious persuasion might work, i talked my mate from a corsa 1.2 sxi into a focus tdci sport :D
 
Take this oportunity to bet him large amounts of money he's going to sodomise his injectors and pump. Unless he's secretly swapped out his common rail stuff for a mechanical pumps and low pressure injectors. Modern injector systems just can't handle the stuff.
 
This sounds as bad as my sisters boyfriend who put water in the power steering fluid reservoir to top it up!

A), but let him find out the hard way!

Josh
 
I wouldn't run a modern diesel like the 330d (or an HDi or whatever) on it, but something with an old style diesel injector pump I would (for example, the Citroen/Peugeot XUD as Bikerz mentioned above in a 306td). Vegetable oil, heating oil, paraffin, whatever. We've even put a gallon of petrol\diesel mix (that we'd emptied at work from someone's vehicle who'd put the wrong fuel in) in my dads Xantia TD with diesel. It just runs and runs! Long as you dilute them all quite a bit with some diesel it'll be ok. :)
 
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