I want to share with you the results of putting nitrogen in my vehicles. My daughter drives a 2005 Tahoe Z-71. I did not tell her I had the nitrogen put into her tires. With no prompting she called to ask me what I had done to improve the handling in her vehicle. She thought I had replaced the shocks or done something different to make it feel more solid on the road. She also told me she had noticed her tanks of gas lasting a little longer, so I asked her to check her MPG. She did and found her miles per gallon were 2 MPG better or about 10% from where she was at 18 on the highway.