0B – 8IGENERAL INFORMATIONDAEWOO V–121 BL4MAINTENANCE AND REPAIRMAINTENANCE AND LUBRICATIONNORMAL VEHICLE USEThe maintenance instructions contained in the mainte-nance schedule are based on the assumption that the ve-hicle will be used for the following reasons: To carry passengers and cargo within the limitationindicated on the Tire Placard located on the edge ofthe driver’s side door. To be driven on reasonable road surfaces and with-in legal operating limits.EXPLANATION OF SCHEDULEDMAINTENANCE SERVICESThe services listed in the maintenance schedule are fur-ther explained below. When the following maintenanceservices are performed, make sure all the parts are re-placed and all the necessary repairs are done before driv-ing the vehicle. Always use the proper fluid and lubricants.Drive Belt InspectionWhen a separate belt drives the power steering pump, theair conditioning compressor, and the generator, inspect itfor cracks, fraying, wear, and proper tension. Adjust or re-place the belt, as needed.Engine Oil and Oil Filter ChangeAPI Classifications of Engine OilThe International Lubricant Standardization and ApprovalCommittee (ILSAC) and American Petroleum Instituteclassifies engine oils according to their performance quali-ty. Always use oil rated API–SJ (ILSAC GF–II) or better.Engine Oil ViscosityEngine oil viscosity (thickness) has an effect on fuel econ-omy and cold weather operation. Lower viscosity engineoils can provide better fuel economy and cold weather per-formance; however, higher temperature weather condi-tions require higher viscosity engine oils for satisfactory lu-brication. Using oils of any viscosity other than thoseviscosities recommended could result in engine damage.Cooling System ServiceDrain, flush and refill the system with new coolant. Referto ”Recommended Fluids and Lubricants”in this section.