Is this additive beneficial? I am currently running Mobil 1 5w30, and would mind trying something different. Will this thicken my oil, possibly making it more "Slippery" than it is? May be overkill, but could also be cheap insurance to my vehicls.
You don't have to pour the whole bottle in. 1/3 -1/2 would be fine. Consider it extra insurance, and probably a little more slippery.
Additives have been reduced with newer oils. VSOT is one of the better off the shelf additives.
It will make the oil [end result] a hair thicker - out of the bottle it is very thick.