2007 Volvo S40 Owner's Manual - Page 204

The transmission oil does not normally need to be changed during the service life of the vehicle. However, it may be necessary to replace the oil if the vehicle is often driven in areas of sustained temperature extremes (hot or cold), when towing a trailer over long distances, for prolonged driving in mountainous areas, or if the vehicle is often driven short distances in temperatures under 40°F (5°C). 231 11 Specifications Engine oil Oil specifications Engine oil must meet the minimum ILSAC specification GF-3, API SL, and 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). Volume between the MIN and Max marks on the dipstick: approximately 1.4 US qts (1.3 liters). Volvo recommends . Depending on your driving habits, premium or synthetic oils may provide superior fuel economy and engine protection. Consult your Volvo retailer for recommendations on premium or synthetic oils. Oil additives must not be used. NOTE Synthetic oil is not used when the oil is changed at the normal service intervals. This oil is only used at customer request, at additional charge. Please consult your Volvo retailer. Oil viscosity (stable ambient temperatures) Operation in hot climates When temperatures exceed 86° F (30° C) in your area, Volvo recommends, for the protection of your engine, that you use a heavier weight oil, such as such as SAE 5W-40 or 0W-40. See the viscosity chart. Operation in temperate climates Incorrect viscosity oil can shorten engine life. Under normal use when temperatures do not exceed 86° F (30° C), SAE 5W-30 will provide good fuel economy and engine protection. See the viscosity chart.