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The recommended oil for a 2004 Mazda3 2.3 is 5W-20. Using high-quality oil is crucial for ensuring the engine operates smoothly. Over time, issues related to the oil may arise, such as a strong burning smell. It is important to address this promptly to prevent potential hazards like engine explosions. Poor quality oil can lead to engine failure and result in unusual knocking noises and decreased fuel efficiency. Regular oil changes, ideally every 5,000 to 10,000 miles, help maintain the engine's health. Failing to do so can cause significant problems for the engine.
The Mazda 3 2.3 model from 2004 needs to use full synthetic motor oil with the viscosity rating of SAE 5W-20.