I wonder if anything has changed since this paper was released. It really questions the decision to use a, recommended by the OEM, xw20 in applications not strictly designed to use it. Like my Sonata.
17 Hyundai Sonata 2.4 | RP 5w20 | OEM | WIX
13 Hyundai Santa Fe 2.0T | PP 5w30 | OEM | WIX (Wife)
18 Honda HR-V 1.5, CVT | FF 0w20 | OEM | OEM (Mom)