Wilson wants to get away with his wife, Myrtle, to start out fresh, with a new life, and save their marriage.
Explanation:
We can find the answer in Chapter 7 of <em>The Great Gatsby</em> novel by F. Scott Fitzgerald.
Wilson decided to get away west with his wife once he discovered that Myrtle had some sort of life apart from him, she was having an affair with someone else. Wilson believes that secluding themselves from the big city environment of the Valley of Ashes, where they had lived for a long time, would stop Myrtle's affair and they could start out fresh somewhere else West in order to save their marriage.
