I'm not usually one to endorse the ramblings of these additive companies...
However after using both their PAS additive and Transmission stop slip, both of which worked really quite well I decided to try their oil additive.
My Old V8 recently started a nice Cam follower tick on cold start and when Hot, i'm assuming because the oil thinned out and that tappet lost prime..
At idle it was irritating the hell out of me so, whats to lose with the Lucas?
Consistency wise it is very sticky, it leaves greasy strings like hot glue, so be wary of that!!
I drained out some of the 10w60 to make room..
New stuff took an age to pour in, in hindsight I should of warmed the bottle up..
A good hard drive ensued, and upon returning home the TICK was no longer present, even with my ear in the arch which is where it was really prevalent..
I've since Started it from cold too, and the tap has disappeared there too...
So it sum up..
It does work in some cases....
Here is the Cold start rattle...
after being sat for 2 weeks