First, let me say I have found this forum to be very interesting and informative. There is a lot of helpful information here based on years of experience. I haven't ridden for years and recently bought an Ultra Classic so my wife and I could both ride in comfort. I've wanted a bike for years but held out until I could afford a Harley. That said, I've found the topic of oil interesting because of all the different opinions. I've decided to use Mobil-1 in the engine because I use thier products in my car and van and I am happy with the performance and the availability. I'm going to use Spectro GL-1 in the transmission because of all the possative posts I've read. I'm still up in the air about the primary oil and I'm interested to know how many people use ATF and has anyone had bad results with it? I'm probably going to go with Spectro, Bel Ray or HD+ but I'd like to learn more about the results of ATF in the primary and if anyone has had problems from using it. It sounds like many aftermarket clutch packages spec it.