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Refueling a gasoline engine: dangerous for the hardware?

 
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ulf
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Post10-04-2015, 11:45    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

Hello,

For example, with diesel-powered Polos and Ibizas, you can sometimes overfill the tank by about 10 liters using a "nipple trick" if you have a particularly long distance to drive, or if the fuel is currently "cheap." Apparently, no damage is being caused.

But what about the gasoline cars? Our newer models (Polo 6R and Skoda Rapid) also allow the "nipple trick," but they also have an activated carbon filter canister. Can it be damaged by flooding in such a way that the MIL (presumably a power indicator or similar) eventually turns on permanently?
Then, of course, the attempted thriftiness/convenience would completely backfire icon_eek.gif.
Gruß Ulf
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Translated on 03-07-2026, 19:45.
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Hutfahrer
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Post10-04-2015, 12:06    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

Never mind what happens at:

- VW Jetta 2
- Opel Calibra
- Suzuki Ignis FH


One should factor in the possibility that the soup will expand in the sun. At some point, the VW and Opel cars ran out of fuel, while the Suzuki is consuming an incredible amount of fuel and then runs very rich for the first 50 kilometers.
Automobile Zeitzeugen: |SUZUKI Swift Sport (2008)| |Smart 450 (2002)| |Kymco Heroism 125 (1997)|


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vwSchrauber
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Post10-04-2015, 12:21    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

The space is specifically designed to accommodate volume expansion.

Overcharging the battery and then driving more than 50km should not be a problem. However, overcharging the battery and then leaving it in the heat is likely to cause issues. Think about how gasoline expands, and how much of it evaporates when it comes out of the underground tank at around 10°C and then warms up to around 25°C...
selber schrauben - statt Werkstattpfusch


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Autoservice
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Post10-04-2015, 13:02    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

It's not without reason that this device, which is designed to prevent overfilling, is installed.

However, if a long journey is planned immediately after refueling, I don't see a problem with that. Otherwise, overfilling the tank is just nonsense... @Ulf. Every kilogram of fuel on board costs additional energy icon_smile.gif.
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**Technische Fragen bitte ins Forum und nicht in mein Postfach**


Translated on 03-07-2026, 19:48.
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ulf
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Post10-04-2015, 13:09    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

vwSchrauber wrote:
Overfilling the tank and then driving more than >50km will not be a problem. Overfilling the tank and then leaving it in the heat, however, probably will...
Thank you for the tip; I always keep this issue in mind. So far, no car has ever exploded shortly after being refueled icon_smile.gif.

@AutoserviceViewing profile: Autoservice:
Despite the problematic power-to-weight ratio after refueling icon_lol.gif, I still regularly find myself wanting to refuel as infrequently as possible, and then to fill up as much as possible at the lowest possible price.
Gruß Ulf
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Translated on 03-07-2026, 19:49.
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Autoservice
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Post10-04-2015, 21:10    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

Quote:
@AutoserviceKFZ-Schrauber Profile: Autoservice:
Despite the problematic power-to-weight ratio after refueling icon_lol.gif, I still regularly find myself wanting to refuel as infrequently as possible, and then to do so with the largest possible amount, and at the cheapest possible price.


Perhaps a spare canister, something like a 20-liter metal container?
LG, Onkel BM

*Nichts ist einfacher, als sich schwierig auszudrücken......*

**Technische Fragen bitte ins Forum und nicht in mein Postfach**


Translated on 03-07-2026, 19:50.
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ulf
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Post11-04-2015, 9:39    Subject: Refueling a gasoline engine: dangerous for the hardware? Quote

Autoservice wrote:
Maybe a spare canister, something like a 20-liter metal container?
That would be unnecessary extra weight, and in a crash, it could also become a dangerous projectile... for now, I'll just fill the existing containers (=tank) completely, which is the least amount of effort.icon_cool.gif
Gruß Ulf
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Translated on 03-07-2026, 19:51.
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