Now, obviously having such a complex and realistic world, we can't just take crude oil from the ground and immediately put it into our planes,trucks, or tanks,can we? (no, you can't do this)
(What i'm doing is completely allowed as i'm not making up or removing current rules as I am not an admin, i'm just merely posting the branches of oil production to help people)
As you can see by the blue, the main things you pretty much want is Diesel, Kerosene (for jets and airplanes), Fuel Oil, and maybe asphalt.
Follow this and that's really to it.