If U only had 2 choices for Synthetic Oil. Just these 2 brands. (No others). For a everyday driver. (No Racing envolved.) 25% Highway-75% intown driving (Stop and Go) A. Mobil 1 B. Amsoil Please just pick either one of these. If U wouldnt chose either one of these just dont comment. I would like as much feed back on this as possible. Thanks Fellas.