hi i have an ebxr6 and its runing very rich atm i need a new exsaughst sadly but i would like to know if i use that no black smoke oil stuff will it stop the black smoke the only reeson i ask is coz cops puled me over for it so far and i dont want car to b over pits >.<

black smoke is fuel not oil, replace your oxy sensor and try that

Also check if your catalytic converter is dead and choking your exhaust.
Paul