Let's face it , there's more to an oil than just how a UOA performed ? ... Most modern turbo / GDI engines require a shorter OCI than yesteryear's PFI non - turbo engines (usually between 3,000 to 5,000 miles) . As long as an oil is D1 / Gen 2 rated - is a top tier PPPP , M1 , Valvoline Advanced , Castrol EDGE , etc. going to perform better than Super Tech , QSUD , Maganatec , etc. (all D1 / Gen 2 rated) at the same OCI of betwen 3K to 5K miles ? ... Probably in the case of the Hyundai 2.4L GDI engine it's more important to jump up to 5W30 weight and abide by the 3,750 mile severe service schedule and a D1 / Gen 2 rated oil than to fret about top tier D1 / Gen 2 oil or a mid tier D1 / Gen 2 oil as I'm not using them long enough to matter ? ... *In an extremely well kept 2017 Sadona 2.4L GDI non - turbo my oil looks awful at between 2K to 2.5K miles using Valvoline Advanced . Ditto with M1 , QSUD , PPPP and Castrol EDGE . As one Bob's poster once put it : "The Hyundai 2.4L GDI engine trashes oil like it invented the term" ! Stinky , soot soaked , black oil at less than 3K miles of average suburban driving is my GDI engine reward... So convince me what I'm getting for my money by stepping up to a higher priced D1 / Gen 2 rated synthetic oil in a GDI engine that again , trashes the oil like it invented the term and won't make it past a 4K OCI before the even more nasty , deeper black oil is drained so I can repeat the process ?
Last edited: