What engine oil is best for hot weather?

In hot climates, It is best to choose fully synthetic engine oils with viscosity grades of 5W-30 or 5W-40, as these products offer excellent high-temperature stability and oxidation resistance. Taking Petronas Syntium 1000 PLUS SP C3 5W-30 as an example, its fully synthetic formulation creates a durable oil film that effectively reduces engine wear under high-temperature conditions while complying with international SP/C3 certification standards, ensuring both fuel efficiency and engine protection. For turbocharged or high-load engines, higher viscosity 10W-40 products such as Shell Helix Ultra or Castrol Magnatec series may be considered, as they employ specialized additive technology to improve high-temperature shear resistance. Regular oil changes (recommended every 5,000-8,000 kilometres) combined with high-quality oil filters will optimize high-temperature protection performance.