There has been a flurry of posts about Royal Purple in the last several days. Rather than hijack the authors' posts to address a side issue raised in one or two of them, here is some info I got from a RP technical advisor today. I posed the question as to the composition of the carrier oil for the additive package, in response to an assertion here that RP's website information was ambiguous. Answer: "The carrier oil for some of the additives that we use are mineral oils. This makes up a vary small % of the finished product."