well, all in all i'd guess that this is a really, really personal question for a forum like this, but since you asked, i'd go with something that's comfortable for you, (everybody has their own tastes and preferences y'know) something probably relatively long lasting, and one that for sure minimizes friction between parts, cuz the last thing you'd want to have happen is a breakdown, or a blowout of some sort as a result of improper lubing. Yikes!

What did you find unsatisfying about the current stuff you use? perhaps that will give a general direction to obtain the biggest "bang for the buck". So to speak. I guess it also would have soemthing to do with how long you plan on leaving it in there. As far as any more additives, i haven't heard about that one, unless they coined a new term for the old stuff they might put in there. One might expect there'd be plenty as it is. but then again, I don't know about that. hope I was of at least some assistance!