I know that the oil is used to cool the turbo, and I assume they are not using the standard synthetic 5W-30 oil (in fact, it states to used only HIGH PERFORMANCE SYNTHETIC OIL on the fan shroud, but it doesn't states which viscosity).

I am curious, like Wagner, I hope BMW use a huge oil cooler/radiator.

Even my E30 325i had an oil cooler (abeit probably a small one)

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