A reasonable car maintenance interval should be comprehensively adjusted based on oil type, driving habits, and environmental conditions. Mineral oil is recommended for replacement every 5,000 kilometres or 6 months (whichever comes first), semi-synthetic oil can be extended to 7,500 kilometres or 8 months, while fully synthetic oil is recommended for replacement every 10,000 kilometres or 12 months. Turbocharged or high-performance vehicles should prioritize fully synthetic oil with a shortened replacement interval of 8,000-10,000 kilometres. For frequent short-distance trips (single trip <5 km), prolonged idling in traffic, or extreme climates (e.g., high temperatures or dusty environments), the interval should be reduced by 20%-30%. Oil should be changed if the vehicle remains parked for over 3 months, even if the mileage threshold hasn't been reached. The oil filter must be replaced during every oil change, with costs ranging approximately RM120 to RM300. Additionally, vehicles older than 5 years should adopt shorter maintenance intervals due to engine wear, whereas new energy hybrid models operating primarily in electric mode may extend intervals to 15,000 kilometres or 18 months, provided regular fluid condition checks are maintained. Adhering to the vehicle manual's recommendations while making practical adjustments based on driving conditions will effectively prolong engine lifespan and maintain peak performance.
