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Castrol Formula RS SAE 10W-60 Synthetic Engine Oil and Castrol TWS Motorsport SAE 10W-60 Synthetic Engine Oil replaces the BMW High Performance SAE 5W-30 Synthetic Engine Oil previously used in all S54 engines.
This oil was phased into production in 6/2001 and is now the only approved/specified engine oil for service use in this engine.
Be sure your dealer uses this oil when you go in for your next service.
Fred Meloan
Internet Manager
BMW of Arlington (Virginia)