I stopped at Wally World today and again looked over their line up of oils. I picked up a jug of Valvoline conventional 10W-30 - walked about 50 feet, looked at the label, asked myself "Why am I downgrading oil in a several thousand dollar engine for a couple bucks". Took a look at the Valvoline semi synthetic, lights again went on, and for a couple bucks more, bought the Mobil 1. Oh well!! Been known to contradict myself before