My, what short memories we have here on BITOG.
While not a fan of Lucas Oil in general, Lucas UCL is know the have PolyIsobutylene and PIB Succinimide in it, both dispersants. While not PEA, which is a likely the most effective dispersant for fuel additives, Lucas UCL does have cleaning abilities in addition to its lubrication properties.
In addition, PIB is known for controlling fuel droplet sizes, keeping them consistent in size and not too small, thus preventing pre-ignition and allowing a more controlled burn rate. This has also been discussed here, referencing studies, and has been shown in studies to increase fuel economy.
While not strong enough to clean up in one tank like PEA based additives, with continuous use like it is designed for, does have benefits. The question is what are you seeking in your fuel additive.
For one-tank cleanups, it is hard to beat the PEA-based additives, like Redline SI-1, Gumout Regane, AMSOIL PI, etc, but they can get expensive to use on a continuous basis, so something like Lucas UCL might be something to consider for continuous use.
Personally, I love and use Redline SI-1 every 5000 miles in all my vehicles, but during the rest of the OCI I do find that a 50/50 mix of MMO and Lucas UCL at 4 oz/10 gallons keeps things cleaned up and running smooth (get a little benefit of the best of both additives).
I now return you to your regularly scheduled programming of bashing Lucas UCL.