Stay away!!! I used it once in a very high mileage ford ranger....with very bad results! Started smoking bad!!! I have connections at Lucas Oil and they wanted me to sue!
Shits like 10 bux in the states.... I've used it in numerous vehicles. Never noticed much gains or negative results either.... NOT worth that thigh price though!
First time (I was young and stupid then) was on an old Bronco II with the 2.9 v6. The lifters got so loud within a day it scared me enough to think the engine was going to hammer something to death. Couple engine flushes later it was back to normal.
Second (I was old and desperate then) was in my 599 block because the filler tube was chuffing light a steam engine climbing a mountain pass. Oil pressure went through the roof when the stuff went in then stabilized about 5 psi higher than normal. Next few days saw the oil pressure dropping off below what it was before the stuff went in. No difference in chuffing. Couple flushes later, oil pressure was back to pre-additive levels.
If you want to look at it objectively, It probably cost me more to use it than not. Who knows what damage it did and it also cost me the price of a couple oil changes and a couple bottles of engine oil flush both times I tried it.
The prices in the auction are outrageous! Stay far away from that rip off.