15W-50 Mobil 1..........I like the $24.50 5-quart jug price at Wally world but more the
1,300 ppm Zinc (Zn) and 1200 ppm Phosphorus (P) content that are for the needed anti-wear protection to critical engine parts, such as piston/cylinder walls, roller cams under heavy valve spring pressure and especially those that employ a solid “flat tappet” type system.
I drive ALL my vehicles hard and they haven't let me down so the current PPM above are very high compared to the other off the shelfs/price per quart
