hello everyone, i have an acura rl, and i'm interest in using pennzoil 5w20 because of the nice additive package in that oil. but the 5w20 is pretty thin and lacking zinc, would you recommend i add half a bottle of STP engine/oil treatment, since that the stp stuff main additive is zinc. this would thicken up the 5w20 a little bit + add more zinc to the pennzoil 5w20. this is the pennzoil 5w20 VOA posted by Cdavidc1949: aluminum 1 iron 1 molybdenum 186 boron 68 silicon 3 sodium 1 calcium 1856 magnesium 5 phosphorus 672 zinc 785 all other levels were 0 vis [email protected] 52.4 flash point 445 TBN 7.0 i'm interest in getting at least a 5k interval from this mixture, or 7.5k is even better. would you please comment?