Alot of people use the team ae oil because it's cheap and readily available. However it is by far not the best. The labels only vaguely tell you what's inside the bottle. Most of the oils aren't actually the viscosity that are stated. They are very inconsistent with their oils. Some of them might actually be the car they say, some are going to be thinner and some are going to be thicker. Keep in mind this Is all with say "45 weight" oil, it can also be said for all of their oils. From the research I have done, and from what I've heard (as well as what I personally use) the pt rc racing oils are the best
http://www.ptrcracing.com/
. I've heard lots of good things about the hudy oils as well.