Save Fuel: Tips & Tricks for Better Mileage

Hi!
I took a risky gamble today.
at the gas station, and I filled up my T4 for 175 €.
I think that should last me for about a year.
"I only use it to pick up building materials, go to the recycling center, etc. Or sometimes to go to work, if there's something to pick up there..."

And here's a question about it:
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

I've seen the diagrams, and I understand them.

What I just don't understand is:
In the top diagram,
at the very bottom, the extremely high values.
What are they caused by?

Hello,

Do you mean Figure 11?

On the y-axis, the effective average pressure is plotted, which, in simple terms, represents the amount of fuel injected and, consequently, the average pressure exerted on the pistons (when they move downwards).
If the effective mean pressure is very low, it means that a small amount of fuel is being injected, for example, when the engine is idling.
When idling, all the fuel is essentially "wasted" because it produces zero power from the crankshaft, therefore the efficiency is very low.

The engine achieves its best efficiency at full throttle between 1600 and 2000 rpm.

If anyone has more diagrams (including diagrams for gasoline engines), they would be very welcome!

Best regards, Rainer.

While we're at it:

Does anyone have experience with the "Dieselblend-Dual-Fuel-System" gas systems from Prinz?