See also:

Modification of your vehicle
CAUTION Your vehicle should not be modified other than with genuine SUBARU parts and accessories. Other types of modifications could affect its performance, safety or durability, and may even vio ...

Fuel
CAUTION Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause engine damage. ...

Outback 2.5i, 2.5i Special Edition & 2.5i Limited
For the best mileage, the 2.5i manual is your best bet, rated at 20/27 mpg city/highway. Along with 1 mpg better highway mileage, the five-speed stick will help you get better acceleration out of ...