PD-TDI: Running on Vegetable Oil

Hello.
I would like to get some information about fuel cooling and the fuel system. I drive a Passat TDI-PD with 100 horsepower. Does anyone here have experience or information on this topic?
Regards,
Frank.

Hello Frank!

Take a look at these pages:
http://people.freenet.de/sthl/
http://www.fatty-fuels.de/

You will be helped.

Jürgen.
... who doesn't drive a car.

Deleted upon request.

We operate an Aral gas station where biodiesel is also sold. We advise all our customers with Common Rail (PD) vehicles to avoid using biodiesel. Although the diesel meets the DIN (or provisional DIN) standard, we have observed an increasing number of problems with PD vehicles. These include excessive white smoke and common rail injector failures occurring every few months.
The 115 hp and 130 hp versions seem to be less prone to this issue.
'You also don't have problems with BMW or Mercedes CDI taxis, and even less so with older TDI models. I drove my old Golf SDI for almost 100,000 km on biofuel without any issues.'

diesel.gustav wrote:

There are, in a somewhat simplified way, different categories there. 1.) "the unsuspecting,"... 2.) the "advanced" students, ... 3.) the "savers,"... 4.) the "merchants", . . .

Hello Gustav.

Although I'm not often on biosites, you've perfectly captured the types of people I've noticed there.

http://home.t-online.de/home/strutzberg/Auto/Auto.html
http://www.biocar.de/download/diplomarbeit_soyk.pdf
I also get the impression that there's something to what's being said about the personality description.
Despite this, there are also many positive aspects. Whether it's worth it in terms of consumption is another matter.

Hello colleagues,

There are - in a somewhat simplified way - different categories there:

1.) The 'ignorant' people who believe that a diesel car can run without problems on vegetable oil. The motto is: 'Can I use vegetable oil to 'gunk up' my diesel?' Please excuse me, but when I read things like that, it makes me feel sick!



Hello Gustav,

My condolences, I recommend Vomex (it helps with vomiting, just a little joke on the side) .

Seriously, I came across a website (http://www.rerorust.de) on which someone claims to drive using salad oil, WITHOUT any modifications! What do you think about that? Can you believe it?

But your categorization is actually quite good...

What I've also noticed is that there are, on the one hand, the fanatics, and on the other hand, the pragmatists.
For the fanatics, even mixing diesel and petrol is a sacrilege, while for the pragmatists, practicality plays a greater role than ideology.

I also understand that you'll run into problems in the winter without modifications if you only use pure PÖL. But what's wrong with mixing diesel with PÖL in the summer? It seems less aggressive than biodiesel, based on what I've heard. Please clarify if there are any disadvantages to mixing regular diesel with PÖL.

Best regards and thank you in advance.
Anton.

The colleague at http://www.rerorust.de drives two old Mercedes cars with inline fuel injection pumps.

Okay, here's a basic overview:
'Common rail diesels have ridiculously low injection pressures. Around 450 bar (pump pressure) is already a lot. In addition, a nozzle injector sprays into a pre-chamber, and the spray pattern is relatively unimportant because the fuel-air mixture is prepared by the extreme turbulence in the chamber. While all the components are designed for these low requirements, they generally tolerate additional loads due to their design (the pump mechanism is often significantly oversized).'

The TDI engine has injection pressures ranging from 950 (VP37) to 1400 (VP44) bar (pump pressure). It also uses hole nozzles. The former is at the limit of its mechanical capabilities, while the latter is prone to carbon buildup because the nozzle orifice cannot self-clean. The TDI is an air-intake direct injector, and as such, it is EXTREMELY dependent on a clean spray pattern.
The tolerance of injection molding components to viscosity changes (such as those that occur with oil contamination) is low.

Indeed, there are relatively few TDI vehicles in the vehicle databases, and those that do exist often have very low mileage. Extreme vehicles are usually heavily modified (e.g., with dual fuel tanks, preheating systems, and diesel-powered starting and shutdown).

Be very, very careful with TDI, PD, and CR engines!

Oh, because I keep hearing it over and over again:
'However, XYZ only uses biofuels and plant-based oils.' You can also get custom-built systems from manufacturers that are specifically designed for biodiesel or vegetable oil, for example. These are often used in truck fleets or in agriculture. However, they are then only suitable for the specific fuel they are designed for.
'These large buses all run on either fuel oil or biodiesel.' Okay, have you ever looked under the hood? They may be TDI (technically), but they use a common rail injection system (and tractor technology).

CU Gremlin.