Stoops Buick GMC

I went to Stoops to test drive a used Terrain. The salesman went on some marketing speal about the advantages of nitrogen filled tires. Now I'm a mechanical engineer and know a bit about gasses and thermodynamics. The theoretical advantages of N2 do not bear out in practice. My wife asked me if the salesman was correct. I called bull[non-permissible content removed]. That offended the salesman and he abruptly left letting my wife and I conduct our own test drive. When we returned, impressed with the car, the owner told me he didn't like how I spoke to the salesman and asked us to leave. So we left. A note, I was answering my wife and not speaking directly to the salesman. Aparently these people don't want to deal with an educated person and work fairly. Shame for them, that car was quite nice and we may have bought it. Instead we purchased a Ford Edge from Bill Estes about an hour later.