2021 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE

Engine Oil: Replacement

CAUTION: If the engine oil is spilt over exhaust pipe or the under cover, wipe it off with cloth to avoid emission of smoke or causing a fire.
  1. Open the engine oil filler cap for quick draining of engine oil.
  2. Lift up the vehicle.
  3. Drain engine oil by loosening the engine oil drain plug.
    NOTE: Prepare the container for draining of engine oil.
    G05659291Courtesy of SUBARU OF AMERICA, INC.
  4. Tighten the engine oil drain plug after draining engine oil.
    NOTE: Use a new drain plug gasket.

    Tightening torque:Β 

    46.5 N.m (4.7 kgf-m, 34.3 ft-lb)

    G05659291Courtesy of SUBARU OF AMERICA, INC.
  5. Lower the vehicle.
  6. Using engine oil of proper quality and viscosity, fill engine oil through the filler duct to the "F" line on the oil level gauge. Make sure that the vehicle is parked on a level surface when checking oil level.

    Recommended oil:Β 

    Refer to "SPECIFICATION" for recommended oil. Refer to LUBRICATION(STI)>GENERAL DESCRIPTION>SPECIFICATIONΒ .

    Engine oil capacity:Β 

    Refer to "SPECIFICATION" for engine oil capacity. Refer to LUBRICATION(STI)>GENERAL DESCRIPTION>SPECIFICATIONΒ .

  7. Close the engine oil filler cap.
  8. Start the engine to circulate the oil in engine.
  9. After stopping the engine, recheck the oil level. If necessary, add engine oil up to the "F" line on oil level gauge.
G13640846Courtesy of SUBARU OF AMERICA, INC.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.