They are all Group II and II+ oil. No proof to show which is better. Besides, oil company re-fomulate their oil once in a while. 20 years ago, PYB is use to be the worst sludge monster. Between $13 to $18, there are ST, QS, Valvoline, Castrol GTX, Motorcraft, Mobil Super, PYB and Chevron/Harvoline, Shell. All these are now SN certifieda and good for 5K OCI and last your car to 300k.