I use it and I like it very much. I strongly recommend you look for the 1 gallon bottle of Lucas UCL at truck stops as I have seen it for 20 dollars for a gallon at truck stops.
My routine is to use 3 oz. every tankful. I bought a tank of bad gas that made the engine feel like there was water in the fuel even at highway speeds. I added the 3 oz. dose (after consuming 2 of the 16 gallons) and the difference was night and day. The next tankful got a 6 oz. shot.