Yeah, I wasn't really picking on you, I just see on the ads for nitrogen filling how it compares to Oxygen. I'm not even sure if they are realizing what they are saying!
I wasn't really able to tell any difference in fuel mileage, since mine has dropped some for the winter just like it does every year. Just in my opinion the main gain is in tire life itself. With tires being one of the more costly and difficult items to recycle, (and being such the "mosquito motel" as they are when piled up outside) there will be an eco-gain there somewhere.
