Thanks!
All of them (5w30) could be interchangeable additive wise. That 5w20 GTX Magnatec looks strong.
I agree about the Magnatec.. and the Valvoline maxlife looked quite nice too.
Truth is.... All major big name oil blenders like Mobil, Shell, Chevron, BP make oils that are truly outstanding...
Truth is... API SP Oils made by Amalie, Warren Distribution and Warren oil and Cam2 and Super S are really quite good too.