And while you are at it pick up some books on psychology to figure out why you are so insecure about your nationality since it wasn't even brought up in his post. Topography does not equal Nationality. An engineer with all your qualifications should be able to figure that out.

Any idea if the guys designing those oils and coming up with recommended ratios have engineering degrees too? Maybe if they were just in it to sell product they would recommend we all run 20:1.