The engine oil filling tube in a truck is pivotal for ensuring the engine runs smoothly. Its replacement cycle is closely linked to the mileage covered. Additionally, the driving environment and operating conditions significantly impact its lifespan.

When driving short - distances on decent roads, the engine operates under relatively low stress. If the oil filling tube is made of high - quality materials and well - maintained, it can typically last 5 to 7 years. Or, when the mileage hits around 40,000 - 50,000 km, it's time to assess if replacement is needed.

However, if the truck frequently operates in harsh short - distance environments like construction sites or mines, the constant vibrations and sand erosion will hasten the wear of the tube wall and aging of the seals. It's advisable to inspect the oil filling tube every 2 to 3 years or when the mileage reaches about 30,000 km. Based on the inspection results, decide whether to replace it. Sand can easily penetrate the joints, wearing down the seals and tube wall, thus increasing the risk of leakage.

For trucks on medium - and long - distance trips, the engine runs continuously for extended periods, and the oil filling tube is used frequently. During normal highway driving, conduct a thorough inspection of the oil filling tube every 3 to 5 years or when the mileage reaches around 100,000 - 150,000 km. If there's minor wear on the tube wall and some seal aging, it can remain in use with closer monitoring. But if there are signs of severe wear, corrosion, or leakage, replace it immediately.

In harsh driving environments such as the high - humidity and high - salinity coastal areas or the sweltering desert highways, the oil filling tube ages and deteriorates faster. Inspect and consider replacement every 2 to 3 years or when the mileage reaches around 80,000 - 100,000 km. High temperatures can alter material properties, making plastics brittle and metals oxidize more rapidly. High humidity and salinity, on the other hand, exacerbate corrosion issues.

Under ideal long - distance heavy - load driving conditions, meaning good roads and proper vehicle maintenance, the oil filling tube may start showing visible aging signs when the mileage reaches around 200,000 - 250,000 km. Thereafter, conduct a detailed inspection every 1 to 2 years. Based on parameters like tube - wall thickness and sealing performance, determine if replacement is necessary. Even without obvious issues, considering the high - intensity usage, preventive replacement can be considered when the mileage reaches around 300,000 - 350,000 km.

In real - world transportation, long - distance heavy - load trucks face complex road conditions and environments. In cold northern regions, low temperatures make rubber seals hard and brittle, reducing their sealing ability. When driving in mountainous areas, the frequent uphill and downhill stretches and rugged roads increase the vibration and pressure on the oil filling tube. In such complex scenarios, inspect and consider replacing the oil filling tube every 1 to 1.5 years or every 150,000 - 200,000 km driven to ensure a stable engine oil supply.

Grasping the replacement cycle of the oil filling tube accurately can effectively safeguard the stable operation of the truck engine, extend the vehicle's service life, and cut down on transportation costs and breakdown risks. Truck drivers and maintenance personnel should make sound judgments and replace the oil filling tube in a timely manner, depending on the vehicle's actual driving conditions.