By driving at or even a little below the speed limit, avoiding "jackrabbit" starts, anticipating stops and lifting your foot from the accelerator sooner, keeping air filter clean, changing spark plugs when recommended, and checking tire pressure often, adjusting as needed to keep to the recommended pressure.
Fuel injection is a great thing, giving good performance and better gas mileage than a carburetor, but there really isn't much to "tweak" to make gas mileage higher. None of the aftermarket devices for improving fuel mileage actually work unless they, through the placebo effect, cause you to change your driving habits.
The 2001 Subaru Forester got 4 star reviews from Edmunds. The car is an all wheel drive. The fuel economy is 25 mpg.
The 2001 Subaru Forester has 16 valves.
The 2001 Subaru Forester has a 5-speed manual.
The 2001 Subaru Forester has a flat 4 engine.
The 2001 Subaru Forester is a gas-powered vehicle.
The 2001 Subaru Forester's turning circle is 34.7 ft..
The 2001 Subaru Forester runs on regular unleaded.
The height of the 2001 Subaru Forester is 5 ft. 2.8 in. (62.8 in.).
The 2001 Subaru Forester has single overhead cam (SOHC).
The 2001 Subaru Forester is 14 ft. 7.6 in. (175.6 in.) long.
The 2001 Subaru Forester has 40.2 in. of front head room.
The 2001 Subaru Forester has 51.4 in. of front hip room.