How Many Kilometers Should Gear Oil Be Changed?
2 Answers
Gear oil change intervals depend on actual conditions, typically requiring replacement every 40,000 kilometers. With technological advancements and improved automotive component manufacturing standards, the requirements for various lubricants have also increased. The primary function of gear oil is to enhance lubrication between gear transmissions, preventing tooth surface wear while extending gear service life. Gear oils can be classified into different categories based on various standards. Viscosity falls into two types: 1) According to 100°C kinematic viscosity and apparent viscosity at 150,000mPas, common specifications include seven viscosity grades: 85W/140, 80W/90, 75W, 75W/90, 85W/90, 90, and 140; 2) In China, gear oils are categorized by quality into three types: Heavy-duty vehicle gear oil CLE, medium-duty vehicle gear oil CLD, and ordinary vehicle gear oil CLC.
I've been driving for over twenty years, and the mileage for gear oil replacement really depends on the specific situation. Manual transmission cars generally recommend changing it every 60,000 kilometers or so. But if you're like me, often driving long distances or on mountain roads, it might be better to change it as early as 50,000 kilometers. Once I delayed until 80,000 kilometers, and the gear shifting became noticeably stiff. When I took it to the repair shop, the oil was completely black, and the transmission had a minor issue, costing me more unnecessary money. Checking it yourself is simple—just pop the hood and look at the dipstick. If the color is dark brown or has metal shavings, it's time to change it immediately. Different car brands vary quite a bit; Japanese car manuals might say 40,000 kilometers, while European cars sometimes recommend 70,000 kilometers. Although saving money is good, don't skimp on small expenses and end up with major repairs.
