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wetec Guest
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17-01-2003, 13:45 Subject: Diesel-Gasoline Mixture in PD? |
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hi diesel freaks,
I heard that some diesel engines, during winter operation at extremely low temperatures, are refueled with additional gasoline!
is this also possible in the summer and does the performance actually increase?
slightly?
better asked: does the PD engine handle an additional 3-5% gasoline without risking damage to the engine or catalytic converter? And does this actually increase performance?
thanks for your help
wetec |
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Bertil Profi-Schrauber

Joined: 04/15/2002 Posts: 5628 Karma: +108 / -0
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17-01-2003, 15:24 Subject: Diesel-Gasoline Mixture in PD? |
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Hi,
What is this for?? Or do you often travel to Siberia?? Winter diesel here in D is at least -20°C.
When using DI (Direct Injection) engines, I would advise against adding gasoline, as this reduces the lubricating properties of the fuel and increases the risk of damage to ESP (Electronic Stability Program) or PD (Powertrain Control) components. Gruß Bertil
Skoda 5E5 CZDA + Mini R50 W10 + VW ID.3 + Fiat Ducato 250 + 161 DX
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Thomas K. Guest
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17-01-2003, 17:15 Subject: Diesel-Gasoline Mixture in PD? |
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Hello,
According to Daimler, absolutely no gasoline should be added to the CR diesel engines, as even the slightest addition will cause the high-pressure pump to fail.
It happened to a friend of mine.
After he had filled his E320CDI with approximately 10 liters of petrol, he realized 'Oh no...' 'I filled up with gasoline and also added about 55 liters of diesel, after the gas station attendant said there wouldn't be a problem. People usually do this in the winter anyway.'
Then, about 30km on the highway back home without any problems, the car was parked, the next morning, the engine wouldn't start, the starter motor turned, I called Mercedes roadside assistance since it was Saturday, after 1 hour, a mechanic arrived, plugged in a diagnostic tester, fiddled around a bit, went to the fuel cap, opened it and said 'aha, there's gasoline', Long speech, short conclusion:
CR-Pump failure, debris in the entire high-pressure system including. Injectors.
Damage: 4500.-€
The CR pump, injectors, all high-pressure lines, the return line, and filters were exchanged. Fuel lines to the high-pressure pump were cleaned, and the tank was removed and cleaned.
The workshop said they had never seen so many damages since the introduction of the CR-Diesel. This is mainly due to incorrect fueling with gasoline. Many are still dying or have already died at the gas station! |
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ulf Profi-Schrauber

Joined: 04/13/2002 Posts: 11058 Karma: +18 / -0 Location: Saarland 2023 MG ZS Premium Support
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17-01-2003, 18:13 Subject: Diesel-Gasoline Mixture in PD? |
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Thomas K. wrote: |
According to Daimler, absolutely no gasoline should be added to the CR diesel engines, as even the slightest addition will cause the high-pressure pump to fail.
. . .
The workshop said they had never seen so many damages since the introduction of the CR-Diesel. This is mainly due to incorrect fueling with gasoline. Many are still dying or have already died at the gas station! |
Yes: the more high-tech, the more sensitive
I'm so proud of my vintage VP 37 tractor  Gruß Ulf
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Bertil Profi-Schrauber

Joined: 04/15/2002 Posts: 5628 Karma: +108 / -0
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17-01-2003, 19:21 Subject: Diesel-Gasoline Mixture in PD? |
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... Now, your tractor probably won't be happy either! With a limitation: After many tank fills and not on the first  Gruß Bertil
Skoda 5E5 CZDA + Mini R50 W10 + VW ID.3 + Fiat Ducato 250 + 161 DX
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wetec Guest
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17-01-2003, 20:22 Subject: thx |
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Thank you very much!
that's all,
I thought such measures would be performance-enhancing... but there's too much at stake for me!
until then,
Have a good trip! |
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Gremlin Guest
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17-01-2003, 22:49 Subject: Diesel-Gasoline Mixture in PD? |
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Here's the translation, keeping all exactly as they are:
The Bosch statement is clear: NO, NULL, NOTHING, NO addition of {NJET} fuel, regardless of PD, VE, RP, or CR.
RME up to 5%.
and please do not use real tractors or anything like that. Bosch also manufactures fuel pumps for specific applications with specific features...
See you, Gremlin |
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eike Guest
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18-01-2003, 12:46 Subject: Diesel-Gasoline Mixture in PD? |
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Bosch' statement is clear: NO, ZERO, NOTHING, NO addition of petrol, regardless of PD, VE, RP, CR.
RME up to 5%.
Hi,
Why is RME limited to a maximum of 5%?
I have been driving with 100% RME for over 140,000 km without any problems.
A friend's colleague (tractor mechanic) regularly uses old, filtered hydraulic oil. Another acquaintance works at the BW (presumably a company) on the airfield in aircraft maintenance and regularly disposes of kerosene residues, but adds 1 liter of cheap engine oil per tank fill.
And a colleague filled his TDI with 40 liters of gasoline in Tran after his vacation. The engine ran a bit rough and had poor performance. After 80 km, he realized what he had put in and went to the workshop. The tank was cleaned, the pump was checked, and everything was okay. The car still had 50,000 km left on it and was then replaced (lease car).
These things are capable of more than they admit. The above mentioned were all with VP.
According to the workshop, PD-TDI engines are not supposed to run on gasoline.
Greetings
Eike |
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GOLFTDI Guest
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18-01-2003, 17:48 Subject: Diesel-Gasoline Mixture in PD? |
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On a 100 PS TDI PD engine, it was possible to fill up with 40 liters of gasoline. However, this was immediately noticed: the car had moved 1 KM, and then the tank was immediately emptied and new diesel was poured in!
The car was quite erratic when starting the next time, as there was still some fuel in the lines! However, after filling the tank three times, the car had its full performance and showed no issues! |
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