Hey UnleashedBeast - I have a 15 GT with a 6R80 and was curious what you think about Amsoil's offerings after their latest reformulation announcement. I daily drive mine, internals of motor are stock other than OPG / crank sprocket, running on 93 pump gas with a Whipple. I love driving it under boost and make a few quarter mile passes a year, but have no problem letting the motor eat on a straightaway. So - I was thinking either 0W-30 SS or 0W-40 SS - I'd love to hear your input on both and what you think's better. I'd also like to know if going to Amsoil's Mercon LV ATF (blue bottle) is a good idea (it's their fuel-efficient one because the red / regular Amsoil ATF doesn't meet Mercon LV spec even though it's got better viscosity numbers). If you're around I'd love to hear your latest thoughts - and anyone who's got the specific info I'd value your input also!