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yeah i registered way back probably because i was going to post something but never got around to it could you elaborate on shearing? what numbers are you looking @ to determine that? this oil n00b is still trying to make sense of all these numbers i haven't touched the air filter at all...

Hi, I recently received my oil analysis back from OAI for my Mobil 1 0W-40 and charted it up to compare against a previous Redline 5W-30 analysis. Car: 2001 Audi S4 (Stage II+, ie. running aftermarket chip + downpipes, stock turbos) Redline 5W-30: Mileage: ~42,000 miles Sample date...