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The 2005 Nissan Altima requires 5W-30 oil for optimal performance. Using high-quality oil is crucial for maintaining a smooth-running engine. Over time, oil issues can arise, potentially leading to engine failure. One common indicator of problematic oil is a strong burning odor, which should be addressed promptly to prevent any potential hazards, such as engine malfunctions or even explosions. Additionally, engine knocking noises and decreased fuel efficiency may be signs of oil-related issues. It is recommended to change the oil every 5,000 to 10,000 miles to ensure engine health and avoid any complications that may arise from neglecting this maintenance task.
The user manual for the 2005 Nissan Altima does not mention the use of synthetic oil.
Nissan recommends using fully synthetic SAE 5W-30 motor oil in the 2005 Altima.