do I need an additive in my 8 3/4 sure grip?

Bad Sport said
Ultimately, this ^^ is the best route.

Jeff, keep in mind that it's a must to have the additive, it lets the suregrip 'slip', if you will, during normal driving conditions, it helps the unit to not wear out prematurely.

Well, I'm not going to remove the chunk. Too much work for such a small problem.

Anybody know what the ratio from oil to additive is, if I was filling one from scratch?