Ever wonder why fish oil is so healthy for you? Google fish oil and you would be hard pressed to find some disease/syndrome that fish oil or Omega 3 (o3) didn't make better or show improvements with. One of the reasons for this is that the body requires a certain ratio of Omega 3 to the Omega 6. Omega 3 is things like sardines, wild caught salmon, grass fed anything. Omega 6 are mostly in oils such as corn, canola, cotton, flax seed, peanut, safflower, sunflower and vegetable oil. When you get a very high ration of 6 to 3, you get an increase in the inflammation in your body.
So there are two ways to correct this ratio. Supplement with Omega 3 fish oil to up your ratio, and eliminate your oil usage to lower the bad side of the ratio.
If you want to think in terms of Paleo, or WWCD (what would caveman do?) Eat more grass fed beef and wild salmon. He didn't have access to the oils that are found in our foods or used to cook today's food. Not surprisingly, when you eliminate the oils, you eliminate most of the junk food, fast food and food that didn't quite exist when our Great, Great, Grand Parents were roaming this world.