How to invest in crude oil

Crude oil is one of the most lucrative forms of investment out there, it has been around for years now but it still remains very lucrative and the dream of some many to either work in an oil company or have shares in these companies. There are so many ways to invest in crude oil and one of the most common ways is buy stocks or shares form an oil and gas company.

I don't think there are many ways to invest in it unless you have your own refineries so the only way left as per my understanding is by investing in shares of these companies.