What type of engine oil is best for the Koleos?
2 Answers
The Koleos can use engine oil with viscosity grades of 10W-40 and 5W-30. Approximately 5 liters of engine oil is required for the Koleos. Engine oil, also known as Engine-oil in English, has a density of about 0.91kg×10 cubic meters. It serves multiple functions such as lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, and shock absorption, earning it the nickname 'the blood of the car'. Below are some components of engine oil: 1. Base oil is the main component of lubricating oil, determining its basic properties. Additives can compensate for and improve the shortcomings of the base oil, providing certain new properties, making them an important part of lubricating oil. 2. Synthetic oils are further divided into full synthetic and semi-synthetic. Lubricating base oils are mainly categorized into mineral base oils and synthetic base oils. Mineral base oils are widely used and account for a large proportion (about 95% or more), but in some applications, products blended with synthetic base oils must be used.
My friend's 7-year-old Koleos has been using 5W-30 full synthetic oil all along, and he said this viscosity is specified in the original manual. Big brands like Total Quartz 9000 or Mobil 1 are great choices, especially for the 2.5L naturally aspirated engine—it runs really smooth. During maintenance, he noticed that the 4S shops mostly recommend this grade, and the oil pressure stays stable even when climbing hills with the AC on in summer. Last time he tried to save money by switching to mineral oil, but the engine coughed like crazy during cold starts, so he quickly switched back. Remember not to stretch the oil change interval too long—full synthetic usually needs to be changed every 7,000-8,000 km, and the oil filter should be replaced at the same time. Never use no-name oils from roadside stalls; a clogged filter will cost you way more to fix later.
