Volvo S40 - Manual (Page 87)

2003 Volvo S40 & V40
Use of Additives
With the exception of gas line antifreeze during winter months, do not add solvents, thickeners, or other
store-bought additives to your car's fuel, cooling, or lubricating systems. Overuse may damage your
engine, and some of these additives contain organically volatile chemicals. Do not needlessly expose
yourself to these chemicals.
ENGINE OIL
Although some oil consumption occurs during normal engine operation, more oil is consumed when the
engine is new as the internal parts generate higher friction while wearing in to each other. From the
time the engine is new until the first service is performed, the oil consumption could be higher
than normal. For this reason, it is especially important to check the oil every time you refuel your
car during this period. See
page 114 .
pg. 63 Fuel requirements, Refueling
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 alcohols 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
standards, some areas require the use of "oxygenated" fuel.
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
The fuel tank is designed to hold approximately: 16 US gallons (60 liters) with sufficient volume left
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