That is 5k diff lube, it will be very light. And as for quality, Team Assosciated makes quality stuff, and I know that their oils are good, as I have used them before. You might want to try this instead: Traxxas 50k or This
Dude that sounds sweet! I got a free donut once, because the lady working said if you can actually solve that thing I will give you a donut. Well it probably would have been a PB, I solved it in about 35 seconds. She was very impressed