See also:

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 ...

Maintenance service
Periodic maintenance will help keep your vehicle running well. Your Warranty and Service Records Information booklet provides a comprehensive maintenance schedule up to 150,000 miles (240,000 km) ...

Cleaning floor mats
The floor mats should be vacuumed or brushed clean regularly, especially during winter when they should be taken out for drying. Spots on textile mats can be removed with a mild detergent. For ...