324 STARTING AND OPERATING
7-1. FUEL s07aa
CAUTION
. 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 s07aa01
The engine is designed to operate using unleaded gasoline with an octane rating of 87 AKI( 90 RON) or higher.
Fuel octane rating s07aa0103
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:
This octane rating is the Research Octane Number.
AKI:
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 s07aa0104
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 s07aa0128
SUBARU supports the use of reformulated gasoline when available. Reformulated gasoline has been blended to burn more cleanly and reduce vehicle emissions.
MMT s07aa0106
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 s07aa0107
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).