I believe there is an added benefit to the use of this product albeit, sometimes difficult to measure with so many variables involved. I will have to say, this past summer I did experience the highest mpg average that I've ever gotten on my truck using this fuel additive. I was unloaded, driving 55-60 & averaged 19. Normally & without the additive that would have been closer to 16-17 at best. I purchased one 5.25oz bottle & 32oz. bottle. After using the smaller bottle the first time, I simply refill it from the larger one as needed.
100% of the time at home & around town I fuel at Chevron stations with Techron + the Lucas. On trips, I normally fuel at any convenient truck stop, so I use the Lucas then.
I also use it in my generator & ATV.
I have never seen reviews as good as these on any similar type product.
HERE