My 2018 Camry specs 0W16. I put Pennzoil 0W20 in it. The valve-train is quieter, the gas mileage is essentially the same. Very non-scientific, but, I like the quieter valve-train...so, I'll keep putting 0w20 in it. I seriously doubt Toyota's 0w16 is performing measurably better than Pennzoil Platinum 0w20.