Starting and operating / Fuel 7-3
Fuel
CAUTION
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. Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause damage to the engine and / or fuel system .
. Some gas stations , particularly those in high altitude areas , offer fuels posted as regular octane gasoline with an octane rating below 87 AKI ( 90 RON ). Use of those fuels are not recommended .
& Fuel requirements
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The engine is designed to operate using unleaded gasoline with an octane rating of 87 AKI ( 90 RON ) or higher .
! Fuel octane rating
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Using a gasoline with a lower octane rating can cause persistent and heavy knocking , which can damage the engine . Do not be concerned if your vehicle sometimes knocks lightly when you drive up a hill or when you accelerate . Contact your SUBARU dealer if you use a fuel with the specified octane rating and your vehicle
knocks heavily or persistently . ! RON
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This octane rating is the Research Octane Number .
! AKI
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This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index ( AKI ).
! Unleaded gasoline
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The neck of the fuel filler pipe is designed to accept only an unleaded gasoline filler nozzle . Under no circumstances should leaded gasoline be used because it will damage the emission control system and may impair driveability and fuel economy .
! Reformulated gasoline
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SUBARU supports the use of reformulated gasoline when available . Reformulated gasoline has been blended to burn more cleanly and reduce vehicle emissions .
! MMT
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Some gasoline contains an octane-enhancing additive called MMT ( Methylcyclopentadienyl Manganese Tricarbonyl ). If you use such fuels , your emission control system performance may deteriorate and the CHECK ENGINE warning light / Malfunction indicator light may turn on . If this happens , return to your authorized SUBARU Dealer for service . If it is determined that the condition is caused by the type of fuel used , repairs may not be covered by your warranty .
! Gasoline for cleaner air ( 2.0 L engine models )
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Your use of gasoline with detergent additives will help prevent deposits from forming in your engine and fuel system . This helps keep your engine in tune and your emission control system working properly , and is a way of doing your part for cleaner air . If you continuously use a high quality fuel with the proper detergent and other additives , you should never need to add any fuel system cleaning agents to your fuel tank .
Many gasolines are now blended with materials called oxygenates . Use of these fuels can also help keep the air cleaner . Oxygenated blend fuels , such as ethanol ( ethyl or grain alcohol ) may be used in your vehicle , but should contain no more than 15 % ethanol for the proper operation of your SUBARU .
Do not use any gasoline that contains more than 15 % ethanol , including from any pump labeled E30 , E50 or E85 ( which are only some examples of fuel containing more than 15 % ethanol ).
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