What type of engine oil is used in JMC Shunda?
2 Answers
JMC Shunda uses 15W-40 engine oil. The functions of engine oil: Lubrication: Maintains the viscosity between the cylinder and piston to ensure normal operation, reduces friction between components, and minimizes wear. Cooling: Assists the vehicle's cooling system to some extent in lowering the internal temperature of the engine. Cleaning: Removes sludge, carbon deposits, and other impurities adhering to engine components. Sealing: Seals gases within the engine piston and piston rings, reducing the entry of external contaminants. Rust and Corrosion Prevention: High-quality engine oil adheres to component surfaces, preventing contact with air, acidic substances, and harmful gases, thereby protecting engine parts from corrosion caused by atmosphere and water. Shock Absorption: When the pressure at the engine cylinder port increases suddenly, placing a heavy load on the piston, piston rings, connecting rod, and crankshaft bearings, the lubrication transmitted through the bearings helps cushion the impact load.
I just bought a JMC Shunda not long ago, and I pay special attention to maintenance details when driving for deliveries. According to the owner's manual, the recommended engine oil is usually SAE 15W-40 with API CI-4 grade. This is mainly because the diesel engine in the Shunda requires high-viscosity oil to protect its components under high temperatures. The 15W indicates good fluidity at low temperatures in winter, preventing startup difficulties, while the 40 viscosity in summer helps prevent wear. A friend of mine used the wrong oil grade and experienced engine stiffness, costing over a thousand yuan in repairs. So, I strongly recommend regularly checking the oil level and adhering to the oil change intervals. Actually, 15W-40 is quite common and used in many light trucks. Choosing a reputable domestic brand offers good value for money, and just be mindful of the ambient temperature—in extremely cold areas, you might occasionally switch to 10W-30 as a transition. Proper maintenance can reduce unusual noises and extend the engine's lifespan.
