I use it for a truck that takes 36 liters and I put two liters of the product. Personally, I didn't notice any difference, but I put it as a precaution because the engine has 1,600,000 kilometers. I put it together with every oil change I do every 20,000 kilometers

I used it on a motorcycle with a wet clutch (Africa Twin 750 and V-Strom 650) and in my car, and I was amazed!!
The engine noise was greatly reduced, it runs smoother.. The fine metallic noises were reduced too!!
It even stopped a small leak I had from a flange on the V-Strom..
I will use it in every service because it reduces engine friction and you can hear it!!