What do you know about Petroleum Engineering? Are you interested in it because you read somewhere that it is the highest paying major? I remember reading from a Petroleum Engineer that if oil is not a "passion", you ain't gonna make it, and I happen to agree.
The hours are long, sometimes you just work in the middle of nowhere but what made me want to major in Petroleum Engineering is the fact that my stepfather worked for an oil trading company in Houston, so I understood the business way before I thought of it as a career.
Also the fact that oil/energy has always been a fascinating subject to me, an obsession (as an economist), also I am very proud to tell people that I will be majoring in PE, it is a major that is not very common and most people out there don't know anything about it, so it is always a good conversation starter.
If you are going into it, solely because you read somewhere that it is the highest paying job right now, I really don't think you will be a very happy person down the road, do your research and make sure you understand what you are getting into before making such an important decision, good luck!