The EA888 2.0 Gen3 in the GTI/GLI is a bit higher stress engine, and like anything else, probably benefits from increased HTHS. Formerly speced to run on 502.00 and only changes made when speced to 508.00 oil were lower tension piston rings and a higher volume (read: faster speed) oil pump to keep pressure up with thinner oil, which VAG did engine family-wide in 2018. Prevailing conspiracy theory is that the change to thinner oil was made to satisfy CAFE in US (I'm one of those that believes this too). OE branded oil is Mobil1 ESP X2 0W-20 and the slightly thicker ESP 0/5W-30 is 504.00. I use the 5W-30 in my Tiguan which has the lower power Budack 2.0. YMMV. Enjoy the controversy that ensues
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