2009 Subaru Impreza Owner's Manual - Page 336
2009 Subaru Impreza Manual
Page 336 highlights
Maintenance and service 11-21 Check the oil level monthly. 1. Park the vehicle on a level surface and stop the engine. 2. Pull out the level gauge, wipe it clean, and insert it again. 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. NOTE There is no transmission oil level gauge for WRX STI. & Recommended grade and viscosity 1) 2) Upper level Lower level SAE viscosity No. and applicable temperature Each oil manufacturer has its own base oils and additives. Never use different brands together. Oil grade: API classification GL-5 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.