Thanks for all the replys. Somehow I got the mistaken Idea that the synthetic oil was "slicker" and would reduce internal friction and thus a bit more MPG. However I am supposing since the viscosity remains the same and it does not contain things like silicone or whatever to allow the internals to move easier there would therefore be no improvement in MPG. However aditives such as "Slick 50" do reduce friction but I don't know if that is at the sacrifice of protection for the engine. From what the concinsus is saying here, looks like the high quality 5W 50 oil is about the best one can do.
SO, In a real world, besides not having a lead foot, and perhaps using 89 instead of 87 octane (as someone suggested), WHAT in the world can I do to increase my MPG?
