Only if you buy Shell v-power or BP Ultimate et al. They cost more pennies per litre. I'll be the first to admit it's swings and roundabouts regarding price though.
However, I've used this stuff for yonks and it's noticable how much it improves mpg and like the op says, less smoke too.
This stuff helps with soot accumulation with the dpf.
Anyway............just my opinion.