The last time i visited my Wal Mart oil aisle, it was chaotic and in transition. Today, i got a little better picture. Seems to be fewer choices overall. It appears that 5w20 motor oils are getting eliminated in many instances. QSUD 5w20 was on clearance. In addition, 10w30 seems to be going by the wayside. There were no 5 qt jugs of PYB on the shelfe nor any place for it. Is this a reflection of auto manufacturers drifting back to 30 wt oils (vs 20 wts) and customer acceptance of 5w30 in full size pickups?