Premium is recommended, however I spoke with an employee at a Volvo dealer who said it is not necessary but you should use it every three fill ups just to keep the injectors clean. I still use premium all the time and i would recommend the same!
Premium fuel
The 2003 Volvo S60 is a gas-powered vehicle.
The 2009 Volvo S60 is a gas-powered vehicle.
The 2004 Volvo S60 is a gas-powered vehicle.
The 2008 Volvo S60 is a gas-powered vehicle.
The 2002 Volvo S60 is a gas-powered vehicle.
The 2006 Volvo S60 is a gas-powered vehicle.
The 2012 Volvo S60 is a gas-powered vehicle.
The 2013 Volvo S60 is a gas-powered vehicle.
The 2011 Volvo S60 is a gas-powered vehicle.
The 2001 Volvo S60 is a gas-powered vehicle.
The 2005 Volvo S60 is a gas-powered vehicle.