2001 Nissan Frontier Owner's Manual - Page 207
2001 Nissan Frontier Manual
Page 207 highlights
ADI1061 ADI1062 ADI1063 5. Remove the dipstick again and check the oil level. It should be between the H (High) and L (Low) marks. If the oil level is below the L (Low) mark, remove the oil filler cap and pour recommended oil through the opening. Do not overfill. 6. Recheck oil level with 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. 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. CHANGING ENGINE OIL 1. Park the vehicle on a level surface and apply the parking brake. 2. Start the engine and let idle until it reaches operating temperature, and then turn it off. 3. Remove the oil filler cap. 4. Place a large drain pan under the drain plug. Do-it-yourself 8-11