Schmieröl im Diesel | Posts 16+

"It's clear, you save about 2 liters of diesel per tank fill "

Hmm,

Does he also exhibit the typical "deng-deng" behavior when reducing throttle?
Maybe someone was still sitting in Boat 1000. Otherwise, a good tip for the next secret potion at the fair. Let's see when it first appeared at ibäh.

Best regards,
Christian

I mean, it sounds just as absurd to me as it probably does to you, but I can only report that our T4 has been using about 10 liters lately, and now only 5.9 liters.

but I will also start the field test with my Audi, even though it seems absurd, and then get back to you.

It's clear, you save about 2 liters of diesel per tank fill

Hello Rainer,
Okay, but...!
Best regards,
Günther

PS: I know a car dealer who, even with 'new' diesel customers, used to add two-stroke oil years ago; the engine wouldn't run as powerfully then; however, there were no catalytic converters on diesels back then, and today I would recommend adding 'something' like biodiesel instead.

Hi,

I'm guessing that second-generation diesel engines are significantly better than older diesel engines. Therefore, it might actually be beneficial for damaged/faulty pumps, but I am very sure that it will have no effect on intact pumps/engines.

Maybe it would be a good idea to perform a "before and after" DZR measurement in such an experiment. If there really is something hanging on the pump, it will not only increase the consumption, but also reduce the performance. At least, such an attempt would be more understandable and faster than measuring consumption over longer distances.

Definitely, a 1:200 mixture is much less harmful than the 1:50...1:33 mixture that was used in the IFA second-stage engines. I can still clearly remember over twenty years ago, the attempts to kill voles with these exhaust fumes...

Best regards,

Jan

Hello Jan,

I also suspect that this is due to the improved lubrication and possibly better sealing of the pump plunger.

I didn't have any problems with the engine. According to the MFA, the average fuel consumption without oil is 5.3 liters, and currently with oil it is 4.6 liters.

Today, I also took a look at the values again using VAG-COM. The only thing that caught my attention was... The shifts in the individual injection timings of each nozzle have been minimized.

I am still curious to see how far this tank of fuel will take me.
But, I think I will save more than 2 liters per tank.

hello

Werner

Quote:

I didn't have any problems with the engine. According to the MFA, the average fuel consumption without oil is 5.3 liters, and currently with oil it is 4.6 liters

Are you sure that it's not just the MFA that is "consuming less"?

Quote:

I also suspect that this is due to the improved lubrication and possibly better sealing of the pump plunger.

I see the cause more here: better sealing -> higher injection volume -> less gas to compensate for at the same power level means a shorter injection time and a lower fuel consumption display (which, to my knowledge, uses the injection time as an input signal).
A similar effect can be observed when switching from normal diesel to winter diesel, which was also discussed here in the forum.

Andreas

Hello Andreas,

I don't really believe in this MFA either. But I will see, when the next refueling opportunity arises, what the real outcome was.

hello

Werner

Hi,

Quote:

as far as I know, the injection time is used as an input signal

IMO calculates the MSG consumption based on the injection quantity, specifically the quantity that it has calculated itself. Therefore, "scenarios" like those involving Powerbox, which cause the ESP to do something other than what the MSG "wants", do not lead to changes in the MFA.

Therefore, it probably isn't the reason.

I still believe that the oil helps to make the heavy parts within the pump lighter again.

Therefore, the conclusion from all of this is NOT that the Oelbeim mixture reduces the consumption of a TDI engine, but rather that the Oelbeim mixture ensures that a TDI engine with a defective or partially defective ESP system can run normally with minimal consumption.

Speak: I am quite sure that pouring oil into a properly functioning TDI engine will not affect the fuel consumption.

Best regards,

Jan

Hello,

I believe the cause lies more here: better sealing -> higher injection volume -> less gas to compensate for at the same power level means a shorter injection time and a lower fuel consumption display (which, to my knowledge, uses the injection time as an input signal).

Then (theoretically), there should also be an increase in performance. Because, with full operation of the MSW, the (actual) amount of energy supplied should increase, due to the lower leakage losses. But I cannot answer how significant this increase would be, or even if it would occur. Just a thought I had.

ampac wrote:

Then, theoretically, there should also be an increase in performance. Because, with full MSW (Main Shaft Water) discharge, and due to the reduced leakage losses, the (actual) flow rate would increase.

Not only during full load, but also always above the speed-controlled idle - because the actual flow rate is not captured by any control loop.

The calculated fuel consumption (MFA) should, however, be lower than the overnight refueling consumption, as should the displayed LL injection amount.
Where the latter, however, is difficult to determine, as it fluctuates depending on factors such as internal friction and LiMa load.

Good evening,

In simple terms, this would essentially be equivalent to an indirect 10ct subsidy, as the actual subsidy amount compared to the corresponding MSW is increased. In contrast, with a 10ct subsidy, the MSW is simply further incentivized so that the EDC can reach its 'subsidy target' (although this also involves an increased subsidy amount that is not actually measured anywhere). Then it should also be clear why the MFA is not displaying enough .

@th3_fr34k and Werner-TDM:

Have you also compared the MFA consumption with the actual amount of fuel refilled?

So, I calculated the consumption based on the distance driven and the amount of fuel consumed.

I will fill up my Audi tomorrow evening (since it has a very high fuel consumption) and then go for a test drive with a full tank. If the fuel consumption is below 8.5 liters, it will definitely be a success.

Was denkt ihr, wie viel Öl soll ich hinzufügen? So viel wie bei meinem versehentlichen Versuch oder eher so um die 0,5-0,75 Liter? Und vor allem soll ich wieder normales Motoröl nehmen oder doch lieber 2-Takt-Öl?

The calculated fuel consumption (MFA) should, however, decrease compared to the overnight refueling consumption, as should the displayed LL injection amount.


Hi Ulf,

MFA, has decreased and this is an average of 0.6 - 0.7 liters.

Idling, with a warm engine. Previously, according to the report, the value was 0.6 - 0.7 liters/hour, with some fluctuation. Now, it is a constant 0.5 liters/hour.

OK, I still need a little more time to fill up the tank at night. But I'm also curious to see what the result will be this time.

hello

Werner

Hi everyone,

Consume or not.

My suspicions have now been confirmed by Ulf and Jan.

The reduced consumption was likely only due to 'the ESP functioning properly again due to good lubrication.' This means that the pump was already in a very bad condition. In an intact TDI, there should be no significant savings to report, perhaps just a minimal amount.

On the other hand, the topic shouldn't constantly encourage all TDI drivers to add oil to their diesel, as this could potentially damage their ESP over time, but also slowly ruin the catalytic converter. Perhaps the external fouling of the nozzles could also occur. Therefore, I would be very cautious about using a constant oil addition.

Best regards, Georg

Hello everyone,

Now, here are the results from the last refueling.

So, ohne 2-Takt-Öl, Verbrauch laut MFA: 5,3 Liter - ironischerweise waren es dann 5,78 Liter pro 100 km.

With 2-stroke oil, consumption according to MFA: 4.7 liters - surprisingly, it turned out to be 5.22 liters per 100 km.

Driving behavior or routes were maintained. So, the measurements on the 1st and 2nd measurement were pretty much the same.

I can't really imagine a pump that's hanging in some way, especially since I haven't had any problems with the motor so far. Motor now has approximately 43,000 km on it.

So, jetzt habe ich also eine Tankfüllung voll, und ich bin etwa 100 km weiter. Und ich hätte wahrscheinlich etwa 5 Liter pro Tankfüllung gespart.

1 Liter 2-Takt-Öl kostet mich etwa 5 Euro. Das reicht dann für 4 Füllungen. Over time, this will pay off for me, even if it's only a minimal amount.

hello

Werner