Didn't see this thread till now. Was wondering if there was one since I'm on my 2nd oil change using edge here. I figured it was pretty good since it was Castrol so I went with it. Big fan of their GTX for all my regular cars. I think my oil consumption may have gone down too. I'll need to pay more attention to it on the next oil change. Was loosing about a quart every 4k miles on the ester.