What does hay Gatsby reveal to nick during the car ride into the city in chapter 4?

During the car ride into the city in Chapter 4 of "The Great Gatsby," Gatsby reveals to Nick that he is the son of wealthy parents who are now dead and that he is an Oxford man, claiming to have attended the university after the Great War. He also shares that he is involved in various business ventures, hinting at his mysterious wealth. This conversation reveals Gatsby's desire to establish his identity and connect with Nick, while also highlighting the ambiguous nature of his past.