When selecting oil viscosity in hot weather, it is essential to comprehensively consider engine type, vehicle condition, and climatic conditions. For turbocharged engines operating in high-temperature and high-pressure environments, high-viscosity oils such as 5W-40 or 10W-40 are recommended to ensure oil film stability under extreme heat and minimize component wear. Naturally aspirated engines under normal daily use in non-extreme temperatures typically require 5W-30 or 10W-30 oils, which provide adequate lubrication while maintaining fuel efficiency. Petronas Syntium 1000 SP C3 5W-30, a fully synthetic oil, utilizes an advanced formulation that complies with SP/C3 international standards. For older vehicles with high mileage or significant wear, upgrading to 5W-40 may enhance sealing performance. Due to superior heat resistance, fully synthetic oils are the optimal choice for hot-weather conditions.
