Lubix and 50K diff oil are IMHO opinion the same. Don't get me wrong, I love Lubix, but at that price it's a bit expensive. I did 2 Lunhui's. I swapped them both with C4Y hardware and core. Because of this the screws bottomed out in the core at an amazing tension level. Also meaning that they were exactly the same tension. I lubed one with ~2cc of Lubix and one with ~2cc of Traxxas 50k diff oil.
I then had my friend hide both and give them to me in a random order so that I wouldn't know which was which, to prevent bias. I use one at work, the other at home. The one at work see's 2 averages of 12 a day as well as multiple random solves. The one at home see's 2 averages of 12 a day and I try to do an equal number of random solves on it as I did at work. Neither see use on the weekend. It has been over a month since this experiment and they both still perform identically. I say go with Traxxas, it works well, and for the price it can't be beat.