You'll have to use the key.
The 2010 Volvo XC70 runs on regular unleaded.
The 2013 Volvo C70 runs on regular unleaded.
The 2013 Volvo C30 runs on regular unleaded.
The 2012 Volvo XC60 runs on regular unleaded.
The 2014 Volvo XC70 runs on regular unleaded.
The 2011 Volvo S60 runs on regular unleaded.
The 2015 Volvo V60 runs on regular unleaded.
The 2015 Volvo S80 runs on regular unleaded.
The 2012 Volvo XC70 runs on regular unleaded.
The 2013 Volvo XC60 runs on regular unleaded.
The 2013 Volvo S60 runs on regular unleaded.