You need 91 Octane, which you can use 93 octane and 89 octane mix. which is Premium and Mid grade fuel.
The 2004 Volvo S60 runs on premium unleaded (required).
The 2004 Volvo XC70 runs on premium unleaded (required).
The 2004 Volvo XC90 runs on premium unleaded (required).
The 2004 Volvo S80 runs on premium unleaded (required).
The 2004 Volvo C70 runs on premium unleaded (required).
Premium fuel
The recommended fuel for all Volvo 70 series is premium, 91 RON or better.
The 2008 Volvo XC70 runs on premium unleaded (recommended).
The 2010 Volvo C30 runs on premium unleaded (recommended).
The 2002 Volvo S80 runs on premium unleaded (required).
The 2010 Volvo XC90 runs on premium unleaded (recommended).
The 2001 Volvo C70 runs on premium unleaded (required).