FP Plus for Gasoline. Does it increase MPG?

[regor]

I’m not a user of this product, but I’m always open for valid ways to improve my MPG. A poster here recently said that they have used this product (A fuel additive) and have seen a increase in MPG. Has anyone else ever tried this product and what was their verdict?
Lube Control

[getnpsi]

I wasted my money. I think the people who maintain their vehicles and run tanks of premium fuel from timeto time benefit less than the 87 arco for 100k and 7-8-9-10k dino oil change types.