*WOW* What an amazing product! It seems like there's nothing this stuff can't do!
</Ironie>
Seriously: This stuff really doesn't leave out any of the desired engine characteristics in its advertising claims. In my opinion, anyone who believes in that is to blame themselves and should gladly pay for it.
Einige der gewünschten Eigenschaften ließen sich möglicherweise mit einer Oberflächenbehandlung / Beschichtung tatsächlich erzielen. Aber glaubst du auch nur ansatzweise, dass soetwas durch einen flüssigen Zusatz erzielt werden kann? Dazu noch ohne auch nur eine negative Auswirkung auf den Motor zu haben? Ich no.
For me, this stuff belongs in the same category as things like crystals or magnetic fields that you're supposed to put in the air filter housing or around the fuel line.

It's pure money-making!
And even if something has a TÜV seal, take a look at what exactly was checked for that seal. Certainly, TÜV and similar organizations have not certified that the specified properties are actually met.
I'm going even further: Is this product approved by the vehicle manufacturer? (And by that, I mean approved by the manufacturer themselves, not the advertising claim: "Suitable for all VWs"). What does the vehicle manufacturer say (if there's still a warranty) in the event of damage if you've added something like that to the oil? In any case, the resulting mixture is no longer approved according to specification 507.00.
If needed: I can gladly sell you another 500ml of this "507.00" for a fancy price, complete with a sticker full of marketing promises. It's double the price of regular oil, but still only a fraction of the cost of your miracle product. For an extra charge, I can even add some dye to make it look even more impressive. All you have to do is believe in it, and please write some positive reviews about it.
Head-shaking greetings, at the level of a car enthusiast forum.
Sure, here's the translation:
"Guste" is a German word that means "gust" or "gust of wind." It can also be used to describe a sudden burst of something, such as laughter or anger.