cool, thanks for the info, I'll run dino for .5k and then switch back to 0W-30 Amsoil+filter, that should be good enough for a turbo charged engine right? (I don't figure I have to change the viscosities any, but thought I'd ask at any rate. . .Houston TX temp's range from 40's in the winter to 120's in the summer, for reference sake on whether I'm choosing the right oil). . .

Oh yeah, Demon, why the switch to -40?