i run it in everything but my honda, IMO it saved a 454 of mine from locking up / getting serriously ef'ed
i have torn apart motors that have had lucas ran in them and the stuff "sticks" it really leaves a nice coating over the parts that are in contact with oil, so you know you got oil where it needs to be
lucas is the only additive i run, but i also have had some good luck with engine restore, and would be the only other thing i would run in a engine
have tried the real expensive stuff, the cheap crap and all, lucas seem to have them all beat, all around, all lucas products.....and then engine restore would be the only other thing i would run, i dont know if it was the engine restore, or it just stoped, but had friend w/ a tickin 305, put a can of restore in it and it stoped tickin about 100 miles later
but just to warn you, you have opened up a can of worms, the to use lucas or not to use lucas is like the ford and chevy guys having a what is better convo after a pack of cold beer