I cannot say the positive effects to my car are made alone by that powder. I ordered second set of powder and will put it to other cars as well. Next weeked will get second Lupo 3L treatment to engine and transmission and that is a regular car.
On my car the effect in coasting distances was immediate, but that was with heavy amount of powder. Also what I have heard from my friends the effects should be immediate if your oils are saving any fuel. However with this product they claim that it "coats" the surfaces during time.
I just made second oil change with powder in engine oil and no negative effects even though I am using again that 2.5 times ratio that is recommended. If you search the internet there are already few companies that sell that kind of engine oils.
Nano-based lubricant from Millers Oils: potential fuel saver on track and road
They dont say what is the secret material but I could make small guess what they are using...
http://www.orapinordic.net/nano2021_fin.pdf
That chart is with various mixture percentages 3 different oils. It seems after 2.5% of that nano fluid the performance stays at same level...