I'm an open minded individual so over the years I've tried pretty much everything once.
If the stuff didn't help fuel economy I never bought it again.
Mos2 is the only product I've used that I can repeatably improve fuel consumption when I use it.
So I don't bother with anything else anymore,other than ceratec and I use ceratec first for its anti-wear properties then mos2 for the fuel economy gain.
In 4 cylinder engines I've not been able to note any noticeable fuel consumption benefit however on v6 and v8 engines I can,so to each there own.
This xado stuff might work however I won't be trying it,not when mos2 costs 8 bucks a can,and works.