汽油版2011手冊274頁: Oil specifications Engine oil must meet the minimum ILSAC specification GF-4, API SL, or ACEA A1/B1. Lower quality oils may not offer the same fuel economy, engine performance, or engine protection. Volume: 6.1 US qts (5.8 liters). Oil viscosity Incorrect viscosity oil can shorten engine life under normal use. SAE 5W-30 will provide good fuel economy and engine protection. See the viscosity chart. http://esd.volvocars.net/local/us/2011-Volvo-S40-Owners-Manual.pdf