This same time next year we will begin to see more Blackstone UOA reports on the new SN rated Dinos . While you probably can't go wrong with any of the majors - Pennzoil conventional looks to have the edge in cleaning as well as wear protection in the SN formulation . As long as they stay price competitive (below $15.00 5 qrt jug) Pennzoil conventional will probably hold the top spot. If Pennzoil conventional creeps up to that $15.00 mark some customers will jump up to the $19.00 Quaker State Ultimate Durability / Mobil Super Synthetic while others will drop back to the $12.00 QS Green Bottle or Mobil Super 5000 .