2012 Subaru Impreza Owner's Manual - Page 384

11-16 Maintenance and service CAUTION Be careful not to spill manual transmission oil when adding it. If oil touches the exhaust pipe, it may cause a bad smell, smoke, and/or a fire. If oil gets on the exhaust pipe, be sure to wipe it off. Rear differential gear oil There is no rear differential gear oil level gauge. To check the rear differential gear oil level, we recommend that you consult your SUBARU dealer for inspection. & Recommended grade and viscosity Each oil manufacturer has its own base oils and additives. Never use different brands together. For details, refer to "Manual transmission and rear differential gear oil" F12-6. NOTE 1) 2) Upper level Lower level There is no transmission oil level gauge for STI. Consult your SUBARU dealer to check the oil level. 3. Pull out the level gauge again and check the oil level on it. If it is below the lower level, add oil through the level gauge hole to bring the level up to the upper level. & Recommended grade and viscosity Each oil manufacturer has its own base oils and additives. Never use different brands together. For details, refer to "Manual transmission and rear differential gear oil" F12-6.