Volvo S80 Owner's Manual page 172

RECOMMENDED
MINIMUM OCTANE RATING
(R + M)/2 METHOD
91
Typical pump octane label
Octane rating
Volvo engines are designed to achieve rated
horsepower, torque, and fuel economy per-
formance using premium 91 octane fuel.
Volvo recommends premium for best perfor-
mance, but using 87 octane or above will not
affect engine reliability.
In demanding driving conditions, such as
operating the vehicle in hot weather, towing a
trailer, or driving for extended periods at
higher altitudes than normal, it may be advis-
able to switch to higher octane fuel (91 or
higher) or to change gasoline brands to fully
utilize your engine's capacity, and for the
smoothest possible operation.
MINIMUM
MINIMUM OCTANE RATING
(R + M)/2 METHOD
87
Typical pump octane label
NOTE
When switching to higher octane fuel or
changing gasoline brands, it may be neces-
sary to fill the tank more than once before a
difference in engine operation is noticeable.
Fuel Formulations
Do not use gasoline that contains lead as a
knock inhibitor, and do not use lead addi-
tives. Besides damaging the exhaust emis-
sion control systems on your vehicle, lead
has been strongly linked to certain forms of
cancer.
05 During your trip
Refueling
Many fuels contain benzene as a solvent.
Unburned benzene has been strongly linked
to certain forms of cancer. If you live in an
area where you must fill your own gas tank,
take precautions. These may include:
• standing upwind away from the filler noz-
zle while refueling
• refueling only at gas stations with vapor
recovery systems that fully seal the mouth
of the filler neck during refueling
• wearing neoprene gloves while handling a
fuel filler nozzle.
Use of Additives
With the exception of gas line antifreeze dur-
ing winter months, do not add solvents,
thickeners, or other store-bought additives to
your vehicle's fuel, cooling, or lubricating
systems. Overuse may damage your engine,
and some of these additives contain organi-
cally volatile chemicals. Do not needlessly
expose yourself to these chemicals.
WARNING
Never carry a cell phone that is switched
on while refueling your vehicle. If the phone
rings, this may cause a spark that could ig-
nite gasoline fumes, resulting in fire and in-
jury.
05
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