So a potential client comes into my auto repair shop & insists she needs the air in her tires changed..."to help with gas mileage and performance". I told her that only proper tire inflation is needed, she persisted, "I want the air in my tires changed" (I could've sold this woman on a "Johnson Rod" replacement or "muffler bearings" check out). I tried to assure her again that only proper tire inflation was needed, so much so that I brought one of my techs to explain to her.....to no avail. We gave into her request & of course charged her nothing, she leaves so happy because she got a "sweet deal". LMFAO!