First...

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Please provide the German text you would like me to translate.
A3, manufactured in July 1998, engine code AHF, Alpine Box, 14,000 km with a fuel mixture of 1-30%.

Rainer K. wrote:

... Please provide the German text you would like me to translate. A3, year of manufacture 7/98, engine code AHF, Alpine radio, 14,000 km with 1-30% oil dilution

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Hi Rainer,

Does that mean you dilute your diesel with "broth from the Aldi gas station"?

Are you worried about piston blow-by due to deposits in the piston ring grooves, which can reduce the clearance to zero over time?

Hello Ulf,

ulf wrote:

...does that mean you're diluting your diesel with "broth from the Aldi gas station"?

Correct!

Quote:

Are you not worried about piston blow-by due to deposits in the piston ring grooves, which can reduce the clearance to zero over time?

Time will tell. Since the oil dilution is relatively low and the engine is almost always run at a good temperature on long journeys, I'm honestly not too worried.
In a case involving a driver who exclusively uses diesel fuel (100% TDI), the scenario described above actually occurred after more than 150,000 kilometers.

Best regards, Rainer.

Piston seizure caused by vegetable oil is nonsense!
An endoscopy of a Fiesta that has been driven over 10,000 km showed absolutely no residue in the combustion chambers (search Google for 'Fiaskofiesta').
I personally use 100% rapeseed oil, although not anymore from Aldi (their broth is an insult... it's of questionable food quality and contains additives!), but from a rapeseed oil filling station for 57 cents per liter.
However, an efficient preheating system ('Eckes heat exchanger,' a VW oil cooler between the fuel filter and the injector head) is necessary, along with thick (ideally transparent polyamide) fuel lines, at least good (preferably brand new injectors pressure-tested to 170 bar), and finally (only for improved cold starting), longer, glow-plug-compatible glow plugs.

In my opinion, the minimal modifications should include thicker hoses (inner diameter 8-10mm), a new fuel filter, and/or a conversion of the latter to screw-in filters.

Here are the sources where you can find the stuff at the lowest prices, and where you can also learn a lot of interesting things:

www.monopoel.de (Screw filters, filter housings, spray lines, auxiliary tanks, solenoid valves, filter fleece, etc.)

www.fmso.de (unfortunately, it has been plagued by spam recently, but the archive is a true treasure trove for anyone interested in PÖL).

Here's what else needs to be said: It's also possible in modern TDI engines and similar models. Run on Pöl, but only with a dual-tank system: Start with diesel, then switch to (preheated) Pöl.
However, with the turbocharger engine (1.6TD), I prefer the single-tank solution, even though it requires some tinkering.

Hello Nickl,

I'm sure you know Ölklaus; he drives a Passat TDI. Here is a quote from his website:

Quote:

Unfortunately, I had to replace the engine after 210,000 km. There was a defective piston ring in the 3rd cylinder. Having a cylinder repaired at a VAG workshop would only be slightly cheaper than replacing the engine, and it would not come with any warranty. Since the workshop confirmed that the defect is definitely not due to the use of vegetable oil, I will also use vegetable oil in my ATM after a break-in period. My fuel injectors from the old engine were still in such good condition (according to the workshop), that they were also installed in the new engine.

Unfortunately, I was unable to examine the damage, but based on my experience, piston rings usually fail either due to excessive or insufficient ring clearance, or due to wear.

The Fiesta engine is not a direct injection engine, but a swirl chamber engine, which makes it more suitable for running on rapeseed oil.

It seems that, according to posts in the forums fmso.de and fatty-fuels.de, there is practically proven evidence that insufficient coolant temperature in TDIs can lead to contaminants entering the engine oil (i.e., a cold engine).
And what leaks past the piston rings also ends up in the ring grooves.
Ulfs argument about the stuck piston rings is something I can't entirely dismiss.

The goal, of course, is to completely burn the fuel, which is why there's the effort involved with the two-tank system and preheating. I don't have either of those things, which is why I limit my consumption of alcohol when the weather is warm.

Best regards, Rainer.

Hi,

Okay, here's the translation:

'Something different: The real danger of using regular oil in a TDI engine is its extremely high kinematic viscosity, especially when the oil isn't properly heated. This puts a tremendous strain on the fuel injection pump, and a failure is almost inevitable.'

Pre-chamber diesel engines have SIGNIFICANTLY lower inherent pressures in the pump, which makes it much easier to control the pressure oil.

In a TDI engine, a two-tank system is really necessary, but it only pays off for people who drive a lot. It takes quite a while for the preheating oil to warm up.

In addition, there are multi-orifice nozzles with holes in the micrometer range, which should not be allowed to become clogged, as this could lead to piston melting.

I don't consider fuel contamination in the engine oil to be *the* major problem, because if you want to use pre-mixed oil, it should be for long-distance driving. Short trips are harmful, even with diesel engines.


I will comply with Bosch's guidelines. DIN-EN590 and that's good... but the rest is simply too expensive for me (I want to keep driving my TDI for a while).


btw: please don't tell me about the 'master' of P-oil drivers who has been driving his two Mercedes for hundreds of thousands of kilometers. keyword: inline pump, pre-chamber

CU Gremlin.

Sometimes, messing around with stuff can be fun...
It drives a little more smoothly .

Sometimes, it's fun to mess around with stuff...
It drives a little more smoothly .

Hi,
My wife used almost pure rapeseed oil in her SEAT Cordoba 1.9D (68 hp) without a catalytic converter, and it worked well. Unfortunately, the car was destroyed in an accident.

Pöl would probably have the most fun in an old 200D, which already leaves a trail of blue smoke behind it. If it still smells like a fast-food restaurant and people get really bloated from it...)

Regards,

Eike.