Volvo 2008 V70 Owner's Manual page 259

American Petroleum Institute (API) symbol
The API Service Symbol "donut" is divided into three parts:
The upper section describes the oil's performance level.
The center identifies the oil's viscosity.
The lower section indicates whether the oil has demonstrated energy-conserving properties in a standard test in
comparison to a reference oil.
278
06 Maintenance and specifications
Specifications
Oil volume
279
06 Maintenance and specifications
Specifications
Other fluids and lubricants