Volvo 960 Owner's Manual page 149

1996 Volvo 960
emission control system and could result in loss of emission warranty coverage. State and local vehicle
inspection programs will make detection of misfueling easier, possibly resulting in emission test failure
for misfueled vehicles.
Octane Rating
Volvo engines are designed for optimum performance on unleaded premium gasoline with an octane
rating, AKI of 91, or above. AKI (ANTI KNOCK INDEX) is an average of the Research Octane
Number, RON, and the Motor Octane Number, MON, (RON + MON/ 2).
The minimum octane requirement is AKI 87 (RON 91).
Gasoline Containing Alcohol and Ethers
"Oxygenated fuels"
Some fuel suppliers sell gasoline containing "oxygenates" which are usually alcohols or ethers. In some
areas, state or local laws require that the service pump be marked indicating use of alcohol or ethers.
However, there are areas in which the pumps are unmarked. If you are not sure whether there is alcohol
or ethers in the gasoline you buy, check with the service station operator. To meet seasonal air quality
restrictions, some states require the use of "oxygenated" fuel in certain areas.
Volvo allows the use of the following "oxygenated fuels"; however, the octane ratings listed on this page
must still be met.
Alcohol -- Ethanol
Fuels containing up to 10% ethanol by volume may be used.
Ethanol may also be referred to as Ethyl alcohol, or "Gasohol".
Ethers -- MTBE
Fuels containing up to 15% MTBE may be used.
Refueling
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