Subaru Impreza Manuals 2018 Impreza Owner's Manual | Page 393

11-14 Maintenance and service/Spark plugs Spark plugs Drive belts Manual transmission oil S11AH S11AI S11AJ It may be difficult to replace the spark plugs. It is recommended that you have the spark plugs replaced by your SUBARU dealer. It is unnecessary to check the deflection of the drive belt periodically because your engine is equipped with an automatic belt tension adjuster. However, replacement of the belt should be done according to the maintenance schedule in the “Warranty and Maintenance Booklet”. Consult your SUBARU dealer for replacement. If the drive belt is loose, cracked or worn, contact your SUBARU dealer. It is not necessary to check the transmis- sion oil level. Check that there are no cracks, damage or leakage. However, the oil inspection should be performed accord- ing to the maintenance schedule in the “Warranty and Maintenance Booklet”. Consult your SUBARU dealer for details. The spark plugs should be replaced according to the maintenance schedule in the “Warranty and Maintenance Book- let”. CAUTION & Recommended grade and viscosity S11AJ02 Make sure the cables are replaced in the correct order. & Recommended spark plugs S11AH01 For the recommended spark plugs, refer to “Electrical system” F12-8. Each oil manufacturer has its own base oils and additives. Never use different brands together. For details, refer to “Manual transmission, front differential and rear differential gear oil” F12-6.