I used to put some of that real slippery stuff in my car when I was a traveling sales rep. (PTFF or what ever it is) I noticed that my gas milage improved slightly and the other part of the story which encouraged me to purchase it was that it "coated" the moving parts with this thin layer of lube so when you started the engine it was lubed even before the oil could be pumped around. I am thinking about adding some to the Rockster - especially with the year round riding effort. I did change to a cold weather viscosity.
What do all ya'all think about these oil additives? (I am talking about the $15-$20 stuff you just put in once every 2-3 oil changes.)