See also:

Engine oil
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. Volvo recommend ...

Removing the cover to access the bulbs
NOTE Before starting to replace a bulb, see page 306. 1. Loosen the cover's four retaining screws with the tool (1) provided in the vehicle's tool kit (see page 290). The screws sho ...

Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline to control engine deposits. Detergent gasoline is effective in keeping injectors and intake valves clean. Consistent use of deposit control gasolines ...