Hi, I am writing to ask with cost aside, what will using a dino vs blend of same brand (say Castrol or Pennzoil) give me. I am hoping for a 4-5k miles OCI which by UOA appears is possible with dino. Does a blend help in this aspect. Thanks for insight. I know Shaeffer's is a great oil, but in this case Walmart will perform the change at $15.00 dino or $20.00 for blend.