I was wondering what oil in the 5w30 grade was a low noack low shearing full syn. Ive used pp, valvo pu,Quaker State Ultimate Durability and Castrol syntec and carquest full syn. Ive used Quaker State Ultimate Durability the most and it seems very thin when I drain it. High smell of fuel also. The car calls for 5w20 0r 5w30 so I know if the oil shears down to a 20wt that's fine. I guess id have to do a used oil analysis to truly know. Hyundai said the gamma di engine was hard on the oil and I should def change it by 4,000 miles.