wirklich schnell richtig volltanken | Posts 16+

That's a tough question, and I haven't been able to find a value for it.

if I were to assume the density (which is measured in kg/m³), then...
Will I experience approximately 1.2 liters of expansion with 50 liters of diesel within this temperature range (+30°C)?

Information provided without guarantee; corrections are always welcome!

CU Gremlin.

What shouldn't be forgotten is that not only does the fuel expand, but also the plastic tank. This means that the fuel is more likely to leak when it's cold. As I said, I don't know the coefficient of thermal expansion for either diesel or plastic. However, I strongly suspect that they are similar, since they are both primarily composed of carbon.

There are actually different grades of Aral Diesel (we operate an Aral gas station). However, these are usually clearly labeled separately. So, if the price sign says 'Truck Diesel' (even if it has the same price), avoid it.
Since the last renovation, the two tanks (15,000 and 30,000 liters) have been combined. Since then, the same mixture has been coming from the truck filling station.
By the way, the tanks have been combined so that the tank truck doesn't have to come twice a day. *g*
The proportion of diesel in the fuel has increased by more than 50% since we started, simply because there are now many more diesel cars than there were 10 years ago.

Regarding additives: A truck with a diesel engine also runs on non-additized diesel directly from Rotterdam and fills its tanks. Our TDIs do too - otherwise, you wouldn't be able to refuel at independent gas stations!
It's usually not really worth it, at least not in our area, where the generic diesel is only 1 cent cheaper. I think you can easily make up for that with the higher energy content of the branded diesel.

Just a quick note:
"We operate an Aral gas station."

It's possible that Aral adds particularly good additives to its fuel.
However, the energy content does not necessarily increase compared to diesel when purchased at a regular gas station (or a non-Aral station).
Besides that, I have also never been able to detect any fuel efficiency difference between Aral and other providers.

There's nothing wrong with Aral – I sometimes fill up there myself. But it's important to understand that independent gas stations are usually supplied from the same refineries as brand-name gas stations. Incidentally, even competing brand-name gas stations often get their fuel from the same refinery.

And the higher price is very rarely related to the quality. Fuel prices are simply determined by completely different factors – sometimes even by holiday dates.

"In my opinion, there are significant quality differences between different free gas stations. At least, my TDI seems to perform worse when I fill it up at a "super cheap" station compared to a "normal" free gas station."

Of course, after the holiday dates, that's always the way it is. For example, a hotel room is more expensive during the holidays, or a flight to Mallorca .
Of course, the fuel comes from the same refineries, but it's still a different quality (with different additives).
For diesel fuel, the law mandates a cetane number of 45. Aral guarantees a cetane number of 55, while other brands definitely offer a cetane number of at least 50.

The fuel consumption difference is likely within the measurement tolerances, as it's impossible to drive a complete tank of fuel over the exact same distance, with the exact same driving style, and in the exact same weather conditions.

But I just wanted to clarify that you can probably safely use truck diesel, because it definitely meets the standard for diesel fuel.

With the Lupo 1.4 TDI, the fuel consumption increases by exactly 10 liters after the automatic shut-off kicks in...
I think the actual expansion volume is probably 8 liters, and the rest is the fuel line and other components.
That would mean a total of 42 liters could fit inside the Lupo.

Regards,
Olaf.

Hey everyone,
Most gas stations in a given area are supplied by the same refinery. The difference lies in the additives. These additives are only mixed in during the loading of the tanker truck, and the amount added is typically within a range of +/- 1%. This difference likely doesn't make a huge impact.
ARAL also claims to have the quietest diesel engine. However, no one has been able to verify this so far. Presumably, they are referring to the noise level at night, when the car is parked in the garage .

Regards,

Eike.

Okay, so. Yesterday, I was determined to find out. The answer to the ultimate question.
The tank was almost completely empty, with the gauge below the first line.
Until the first time the fuel pump stopped, 52 liters went in. Then, with a little patience and the vent valve pressed down, 62 liters went in. But that was already the maximum it would take.

Ich wollte das auch mal mit meinem Passi ausprobieren, der hat ja einen 70 Liter Tank... Den aber vollzutanken ist mir ein zu grosser Batzen Geld. Ausserdem ist das ja dann sinnloses Mehrgewicht, was ich mit mir rumschleppe, das den Verbrauch dann wieder erhöht....

P.S.: Have you actually seen how much the new Shell 'V-Power' costs? I think they're crazy.

I've heard about that problem before, but it seems like the new A3 doesn't have it anymore. There's no 'nipple' to push in.
Regarding gas stations, has anyone had positive or negative experiences with different ones? For example, I almost always fill up at branded gas stations. I once heard that Shell diesel, in particular, supposedly makes the engine run better, which I find hard to believe. What do you think? Is it just wishful thinking?

Best regards,

Hi.

You mean this part:
http://www.luxus-wg.de/~martin/auto_bilder/tank_nippel.jpg


"In my Golf 3 Variant, after turning it off, 14 liters of fuel remain in the tank."

Record (nominal 60L tank): Drove to the gas station (150 km) and filled up with 68.5L !!!
(I was really sweating there, because the entire route was on the highway, and I didn't have a 5-liter canister with me - I've now put it back on board.)

m;

There's definitely something to be said for the fact that branded gasoline is better than that from most discount retailers.

I used to get gas at AWI for a while. My car used to run like a locomotive there.
Then I also wanted to try the "ventilation trick" to charge my electric car, but... no luck.
The fuel dispenser was foaming, and I couldn't even fill the tank after clicking the button 20 times. This "saving" isn't worth it to me.

We have a Kaufland 'cheap gas' station nearby.
Their fuel is checked at least once a week and is certified according to DIN standards.
The fuel is delivered by Duck+Maurer.
They obtain their fuel indirectly from Wilhelmshaven, where Aral, Esso, and Shell also source their fuel.

My father, who lives there, spoke with an employee at the refinery and asked where the differences in the fuel are.
Unique and distinct, solely due to the few additives that are subsequently mixed in!
Aral hat früher übrigens noch blaue Farbe dazugemischt!

Anything that is considered 'inferior' is then put into the heating oil tanker trucks.
You'll find slightly lower octane numbers there, but it would still be more than enough for driving.

Well, the question is whether or not you actually need those additives...
Alkohol im Blut macht sich nicht gut.
And the engine is lubricated anyway by the oil.
That's why I buy cheap gas and save at least 1 cent per liter, but usually 4 cents, compared to the 'brand-name' gas stations.

Best regards,
Daniel.

EDIT: Oh yeah: I managed to fit exactly 62 liters of fuel into my Golf 4 yesterday. The first 'click' sound occurred at 52 liters, after which I vented the tank and added another 2 liters using the fuel pump. After that, I only added fuel manually while simultaneously venting the tank.
I'd guess there were still about 2 liters of fuel in the tank. The reserve light has been on for 70 kilometers...

Hello Dan.jel,
The engine is certainly lubricated with oil, but what about the fuel injection pump?
The VEPs (presumably referring to a specific component or system) are at least lubricated via the diesel fuel. The reduction in sulfur content has decreased the lubricating effect. I hope that appropriate additives will have a positive effect in this area.
Best regards.
Alois.

Hello.

Well, theoretically, the fuel should be the same everywhere.
I'm quite certain that at least one gas station contained something different in its tanks than the gas station across the street.

Back then, my car would consistently sputter and misfire when I floored it, sometimes emitting a bluish smoke (which usually indicates oil loss in the engine, although the oil consumption was within acceptable limits), but only when I had filled up at that particular gas station.

I don't want to know what sometimes gets dumped into the underground tanks out of convenience or greed.

The gas station mentioned above was, however, the only one where I've noticed differences. That shouldn't be the norm.

Best regards, Rainer.