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 will help ensure good drivability and fuel economy. If you are not sure whether the gasoline contains deposit control additives, check with the service station operator.
NOTE
Volvo does not recommend the use of external
fuel injector cleaning systems.
See also:
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Inserting the remote key
Holding the end of the remote key with the
base of the key blade, insert the remote key
into the ignition slot as shown in the illustration
and press it in as far as possible (past the
detent) ...
Driving Impressions
Understated and elegant, the S80 is spacious throughout and delivers a
smooth, easy ride. Automatic-transmission shifts are smooth yet noticeable. The
easy-to-drive S80 promises excellent control ...
