What's the latest with respect to additives? I did some research on products like zMax and the like but can't really find anything but marketing hype...
I used Slick 50 a number of years ago and either coincidentally or as a direct result, both engines developed minor valve train issues (valve seals etc).
I already use Royal Purple BUT just thought I would see if anyone had some thoughts on these products...
I used Slick 50 a number of years ago and either coincidentally or as a direct result, both engines developed minor valve train issues (valve seals etc).
I already use Royal Purple BUT just thought I would see if anyone had some thoughts on these products...