2008 Volvo S40 Owner's Manual - Page 228
2008 Volvo S40 Manual
Page 228 highlights
Engine oil 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. 1 See the information on page 254. 255 11 Specifications Engine specifications 1 The engine specifications for horsepower and torque listed in this table are based on the use of premium fuel. Charge air cooler (Intercooler) Turbocharged engines employ a turbo-compressor to force air into the engine inlet manifold and a charge air cooler to cool the compressed inlet air. The resulting increase in air flow raises pressure in the intake manifold and increases