Originally Posted By: MolaKule
If you mean there is MORE engine braking, that usually means your compression has increased; possibly the LubeGard Bio cleaned the rings so they seal better.
As to your engine noise, unless you find the source I don't think any additive will perform any magic.
Actually, what happened after initial 500 km, the engine braking is much lesser (that make the car glide further without any gas pedal depressed) and it kinds of surge when you start accelerate from coasting (that I believe the sign of better compression). However after few hours high speed driving, now it seems back like normal oil without any additive (more engine brake, does not glide much), and torque is getting lesser.
So I think it is true that Lubegard clean the ring and seal better initially, but after 1500 km it seems the effect disappear. Somehow that observation also similar with the use of Rislone High Mileage, the first 2000km is very positive, and then after that the engine consumption worsen again.
I just try to keep the car alive for another 1-2 year without overhaul, so far besides the oil consumption and some noises after the carbon deposit accumulate, the power and fuel consumption is quite satisfactory.
The noise i believe comes from the wear on the top of the cylinder, where the lubrication and carbon deposit balance play apart on the noise generated.