You can’t have clearances that are too small for any SAE grade. If you did then the engine would fail on any start. Inappropriate winter ratings are possible however.Why does VW recommend Greater than 0w-20 or 0w-30 and greater weights? Is Cafe the entire difference, or, is there a difference in machining clearances.
VW specifies an oil with a minimum HT/HS that will prevent excessive wear. But a greater HT/HS will not harm.