7-2Starting and operating
Fuel
CAUTION
Use of a fuel which is low in qualityor use of an inappropriate fueladditive may cause engine damage.
&Fuel requirements
The engine is designed to operate usingunleaded gasolinewith an octane ratingof87 AKI (90 RON) or higher.
!Fuel octane rating
This octane rating is the average of theResearch Octane and Motor Octanenumbers andis commonly referred to asthe Anti Knock Index (AKI).
Using a gasoline with a lower octanerating can causepersistent and heavyknocking, which can damage the engine.Do not be concerned if your vehiclesometimes knocks lightly when you driveup a hill or when you accelerate. Contactyour SUBARU dealer if you use a fuel withthe specified octane rating and yourvehicle knocks heavily or persistently.
!Unleaded gasoline
The neck of the fuel filler pipe is designedto accept only an unleaded gasoline filler
nozzle. Under no circumstances shouldleaded gasoline be used because it willdamage the emission control system andmay impair driveability and fuel economy.
!California fuel
If your vehicle was certified to CaliforniaEmission Standards as indicated on theunderhood tune-up label, it is designed tooptimize engine and emission controlsystem performance with gasoline thatmeets the clean burning low-sulfur Cali-fornia gasoline specifications. If you live inany other state than California, yourvehicle will operate on gasoline meetingFederal specifications. Gasoline sold out-side California is permitted to have highersulfur levels, which may affect the perfor-mance of your vehicle’s catalytic converterand may produce a sulfur exhaust odor orsmell. SUBARU recommends that you trya different brand of unleaded gasolinehaving lower sulfur to determine if theproblem is fuel related before returningyour vehicle to an authorized dealer forservice. The CHECK ENGINE warninglight/Malfunction indicator light may alsoilluminate. If this occurs, return to yourauthorized SUBARU dealer for diagnosis.If it is determined that the condition iscausedby the type of fuel used, repairsmay not be covered by your warranty.
!MMT
Some gasoline contains an octane-en-hancing additive called MMT (Methylcy-clopentadienyl Manganese Tricarbonyl). Ifyou use such fuels, your emission controlsystem performance may deteriorate andthe CHECK ENGINE warning light/Mal-function indicator light may illuminate. Ifthis happens, return to your authorizedSUBARU dealer for service. If it isdetermined that the condition is causedby the type of fuel used, repairs may notbe covered by your warranty.
!Gasoline for cleaner air
CAUTION
Do not let fuel spill on the exteriorsurfaces of the vehicle. Fuels con-taining alcohol may cause paintdamage, which is not covered underthe SUBARU Limited Warranty.
Yo u r u s e o f g a s o l i n e w i t h d e t e r g e n tadditives will help prevent deposits fromforming in your engine and fuel system.This helps keepyour engine in tune andyour emission control system workingproperly, and is a way of doing your partfor cleaner air. If you continuously use ahigh quality fuel with the proper detergentand other additives, you should never
11-16Maintenance and service
&Recommended grade and
viscosity
Each oil manufacturer has its own baseoils and additives. Never use differentbrands together. For details, refer to“Frontdifferential and rear differential gear oil”F12-6.
Rear differential gear oil
There is no oil level gauge. To check therear differential gear oil level, consult yourSUBARU dealer for inspection.
&Recommended grade and
viscosity
Each oil manufacturer has its own baseoils and additives. Never use differentbrands together. For details, refer to“Frontdifferential and rear differential gear oil”F12-6.
Power steering fluid
&Checking the fluid level
WARNING
Be careful not to burn yourselfbecause the fluid may be hot.
CAUTION
.When power steering fluid isbeing added, use only clean fluid,and be careful not to allow anydirt into the tank. And never usedifferent brands together.
.Be careful not to spill powersteering fluid when adding it. If
