Replacing engine oil in advance is indeed beneficial for vehicle maintenance, but adjustments should be made flexibly based on the oil type and actual driving conditions. Mineral oil is recommended to be changed every 5,000 kilometres or 6 months, semi-synthetic oil can be extended to 7,500 kilometres or 8 months, and fully synthetic oil can last up to 10,000 kilometres or 12 months. If you frequently drive short distances (one-way < 5 kilometres), operate in high-temperature and dusty environments, or engage in aggressive driving frequently, it is advisable to shorten the replacement interval by 10%-20%. The oil filter should be replaced with every oil change (costing approximately 30-60 Malaysian Ringgit); otherwise, the effectiveness of the new oil will be significantly compromised. Owners can assess the oil's condition by observing its colour (dark and opaque indicates replacement is needed), checking its viscosity (if it feels thin or gritty), or using a test strip to prevent accelerated engine wear or increased fuel consumption due to oil degradation. Notably, vehicles parked for over 3 months require an oil change even if the mileage threshold hasn't been reached, as the oil oxidizes and deteriorates. Properly scheduling oil changes not only protects the engine but also avoids unnecessary maintenance costs.
