2003 Nissan Altima Owner's Manual - Page 187

WDI0213 WDI0214 WDI0215 Type A 5. Remove the dipstick again and check the oil level. It should be between the H (High) and L (Low) marks B . This is the normal operating oil level range. If the oil level is below the L (Low) mark A , remove the oil filler cap and pour recommended oil through the opening. Do not overfill C . Type B 6. Recheck oil level with the dipstick. It is normal to add some oil between oil maintenance intervals or during the break-in period, depending on the severity of operating conditions. QR25DE CHANGING ENGINE OIL 1. Park the vehicle on a level surface and apply the parking brake. 2. Start the engine and let it idle until it reaches operating temperature, then turn it off. 3. Remove the oil filler cap by turning it counterclockwise. 4. Place a large drain pan under the drain plug. CAUTION Oil level should be checked regularly. Operating the engine with an insufficient amount of oil can damage the engine, and such damage is not covered by warranty. Maintenance and do-it-yourself 8-11