NO you will not have the same outcome diff oil is much thicker compared to shock oil. If you ran shock oil in your diffs it would have no benifical effect on the diffs other than a lubrication, you may as well just use grease it would at least be better than shock oil in the diffs. Next time you go to your LHS pick up a bottle of diff oil and shock oil and see how much thicker the diff oil is, the shock oil will be closer to water (not realy but its the best explanation I can give) the diff oil will be closer to thick honey. THe only similarity in the 2 types of oil's are they are both a silicone based oil. I think its silicone anyway.