That depends on which system you have. Instructions are on page 3-23 of your owner's manual.
If you no longer have your owners manual there is one at the related link.
The 2012 Subaru Outback has 16 valves.
The 2012 Subaru Outback is a gas-powered vehicle.
The 2012 Subaru Outback has a 6-speed manual.
The 2012 Subaru Outback has a flat 4 engine.
The curb weight of the 2012 Subaru Outback is 3389 lbs..
The 2012 Subaru Outback runs on regular unleaded.
The 2012 Subaru Outback is 15 ft. 8.2 in. (188.2 in.) long.
The 2012 Subaru Outback's turning circle is 36.8 ft..
The 2012 Subaru Outback has single overhead cam (SOHC).
The height of the 2012 Subaru Outback is 5 ft. 5.7 in. (65.7 in.).
The 2012 Subaru Outback has 56.1 in. of rear shoulder room.
The gross weight of the 2012 Subaru Outback is 4585 lbs..