the more often the better, haha, i would consult your owners manual, i like to change mine at around the 3000 mile mark, or at least twice a year for a car not driven much. you can go longer if you use synthetic oil, i'de say 5-7000 miles, and remember to change your oil filter too.
The 2004 Subaru Forester has 16 valves.
The 2004 Subaru Forester has a 5-speed manual.
The 2004 Subaru Forester is a gas-powered vehicle.
The 2004 Subaru Forester has a flat 4 engine.
The height of the 2004 Subaru Forester is 5 ft. 5 in. (65 in.).
The 2004 Subaru Forester is 14 ft. 7.2 in. (175.2 in.) long.
The curb weight of the 2004 Subaru Forester is 3090 lbs..
The 2004 Subaru Forester runs on regular unleaded.
The 2004 Subaru Forester has single overhead cam (SOHC).
The 2004 Subaru Forester's turning circle is 34.8 ft..
The 2004 Subaru Forester has a drag coefficient of 0.35 Cd.
The 2004 Subaru Forester has 51.6 in. of rear hip room.