I'm suggesting just buy the synthetic 5W20 that is the best deal. I've used mostly Mobil 1 but if some other name brand is on sale at Walmart, like Castrol Syntec or Penzoil Platinum . Currently here Penzoil Platinum is on sale at Walmart for $20/5qt jug. Mobil 1 is $22 I think. I've got 170,000 miles on my hemi. It burns no oil, runs like a
beotch.