bcp
In My Opinion
Diesel trucks have to black smoke everyone at every stop light or straight away so everyone knows how cool they are.
The new trend is turning to having as little smoke as possible.
Smoke means you are dumping fuel, there is no gain.
what you want is to up the power right to the point that it starts to smoke, then back off a bit to clean it up. That gives you maximum power with the minimum fuel to obtain it.
Those blowing smoke either have a mechanical problem, or they are A-Holes.