The manufacturer recommends the use of Castrol GF-2 5W-30 motor oil in the Volvo S60 for maximum performance under normal driving conditions. Lower quality oils may not offer the same fuel economy, engine performance and engine protection, according to Volvo.
When operating under more demanding conditions, Volvo recommends the use of Castrol SAE 10W/30 motor oil. Such conditions include towing a trailer over long distances, prolonged driving in mountainous areas and during periods when temperatures exceed 86 degrees Fahrenheit, states the Swedish manufacturer. Drivers are encouraged to consult their Volvo retailer for recommendations on premium or synthetic oils that may offer superior engine protection and fuel economy.