What weight oil do you think the RS4 will take? 0/5W-40 or heavier? Lighter? Same? Syn, of course.
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That's too much IMO in any case. Audi tests their engines for hours and hours on end at full speed/rated load for blowby and oil consumption during the develpment phase.
If he pushed the issue with Audi, they'd probably give him a new engine.




