2005 Subaru Impreza Owner's Manual - Page 267

Starting and operating As additional guidance, only use fuels suited for your vehicle as explained below. Fuel should be unleaded and have an octane rating no lower than that specified in this manual. Methanol (methyl or wood alcohol) is sometimes mixed with unleaded gasoline. Methanol can be used in your vehicle ONLY if it does not exceed 5% of the fuel mixture AND if it is accompanied by sufficient quantities of the proper cosolvents and corrosion inhibitors required to prevent damage to the fuel system. Do not use fuel containing methanol EXCEPT under these conditions. If undesirable driveability problems are experienced and you suspect they may be fuel related, try a different brand of gasoline before seeking service at your SUBARU dealer. Fuel system damage or driveability problems which result from the use of improper fuel are not covered under the SUBARU Limited Warranty. Fuel filler lid and cap Refueling 0 UG7501BA Do not let fuel spill on the exterior surfaces of the vehicle. Fuels containing alcohol may cause paint damage, which is not covered under the SUBARU Limited Warranty. 7-4