Anything with the Lucas name says what it will do and do what it says. I currently have the Lucas Semi-Syn Racing ATF in my Tremec 3650 and it ROCKS!!
I have seen this sht do some amazing things in vehicles that have oil consumption problems.
I also put one bottle of the Fuel Treatment in my Stang every oil change @ 5K. None in the engine though since I run a full syn.
I still say just use a good oil, change it frequently and you won't need additives. Now, if your engine is worn and using a lot of oil, that's a whole different ballgame...