I don't know how to make synthetic oil but I have herd that crude oil is not from Dino. It is believed that oil is naturaly occuring deep in the Earth. Oil can be made with water and minerals and high presure equal to what is found deep in the earth. I have a hard time with that many dino's died...
I swiched to Mobil 1 at 210k mi. I have several leaks to take care of that were there before. I tighten the pan and stopped that leak. I used the Mobil 1 10w30. I changed the filter at 3000 mi and after tightening the pan there is no oil consumption.
kurt