I know there are a bazillion oil threads, but I'm not sure what I should do... Currently i'm running Amsoil 0W-20 signature series in my engine. The oil's doing a fine job, however it seems to burn off and i'm forever topping off the oil level. I'm trying to decide what viscosity oil I should go with next. Should I stick with the 0 weight and just bump it up to a 0w30? Or should I go to a 5W30 weight oil? Or maybe even thicker than that and go with a 40 or maybe even that 5w50 motorcraft synthetic that's used in the new 5.0s (JK about that, I know you guys would tear me apart with the "tight tolerance" thing with these mod motors). Seriously though, what viscosity would you go with?