洒水车的发动机在作业过程中长期处于低转速、高负荷状态，尤其是在频繁启停、低速行驶和长时间怠速的情况下，发动机内部零部件之间的摩擦加剧。润滑油在使用一段时间后会因高温氧化而变质，失去应有的润滑和保护性能，导致发动机磨损加剧，甚至出现拉缸、烧瓦等严重故障。因此，定期更换发动机润滑油，是保障洒水车正常运行、延长发动机寿命的关键措施。

The engine of a water truck often operates under low-speed, high-load conditions, especially during frequent starts and stops, slow driving, and extended idling. This increases friction between internal components. Over time, engine oil degrades due to high-temperature oxidation, losing its lubricating and protective properties. This can lead to increased engine wear and even serious failures such as cylinder scoring or bearing seizure. Therefore, regular oil changes are essential to ensure normal operation and extend the engine’s service life.

保持润滑效果，减少磨损

Maintain Lubrication Effectiveness and Reduce Wear

新润滑油能在发动机各运动部件之间形成稳定的油膜，有效减少金属表面的直接接触，降低摩擦阻力。随着使用时间延长，润滑油中的添加剂逐渐消耗，油膜强度下降，无法继续提供可靠保护。定期换油可以恢复润滑系统的性能，最大限度减少发动机内部磨损。

Fresh engine oil forms a stable oil film between moving parts, effectively reducing direct metal-to-metal contact and lowering friction resistance. Over time, additives in the oil are depleted, and the oil film weakens, failing to provide reliable protection. Regular oil changes restore the lubrication system’s performance and minimize internal engine wear.

清洁发动机内部，防止积碳和油泥

Clean the Engine Internally and Prevent Carbon Deposits and Sludge

洒水车发动机在工作过程中会产生积碳、胶质和油泥等污染物。润滑油中的清净分散剂可以帮助将这些杂质悬浮在油中，并在换油时随旧油排出。如果不及时更换，污染物会逐渐沉积，堵塞油路，影响散热和润滑效果，严重时甚至导致发动机拉缸或涡轮增压器损坏。

During operation, water truck engines produce contaminants such as carbon deposits, varnish, and sludge. The detergents and dispersants in engine oil help suspend these impurities, allowing them to be drained out during an oil change. If the oil is not changed in time, contaminants accumulate, clogging oil passages and impairing heat dissipation and lubrication. In severe cases, this can lead to cylinder scoring or turbocharger damage.

中和酸性物质，防止腐蚀

Neutralize Acids and Prevent Corrosion

燃油燃烧过程中会产生酸性物质，这些物质会逐渐混入润滑油中，对发动机内部的金属部件造成腐蚀。润滑油中的碱值添加剂能中和这些酸性物质，保护发动机不受腐蚀侵害。随着使用时间增加，添加剂的碱值会下降，失去中和能力。定期更换润滑油可以有效防止酸性腐蚀，保护发动机关键部件。

Acidic byproducts from fuel combustion gradually mix with the engine oil and can corrode internal metal components. The base additives in engine oil neutralize these acids, protecting the engine from corrosion. Over time, the total base number (TBN) of the additives decreases, reducing their neutralizing ability. Regular oil changes effectively prevent acid corrosion and protect critical engine components.

改善散热，防止过热

Improve Heat Dissipation and Prevent Overheating

润滑油在发动机中还承担着辅助散热的功能，能够带走燃烧室和摩擦副产生的热量。变质的润滑油流动性变差，散热能力显著下降，容易导致发动机局部温度过高，加速部件老化和损坏。定期更换润滑油可以确保良好的流动性和散热性能，维持发动机在正常工作温度范围内。

Engine oil also plays a role in heat dissipation, carrying away heat generated by combustion and friction. Degraded oil has poorer flow characteristics and significantly reduced heat transfer capability, which can lead to localized overheating and accelerate component aging and failure. Regular oil changes ensure good fluidity and heat dissipation, keeping the engine within its normal operating temperature range.

建议更换周期

Recommended Oil Change Intervals

一般建议洒水车每工作250～300小时或每行驶5000～8000公里更换一次发动机润滑油，具体周期应参考车辆制造商的要求和实际作业环境。在粉尘大、高温或频繁启停的恶劣工况下，应适当缩短换油周期。

It is generally recommended to change the engine oil in a water truck every 250–300 operating hours or every 5,000–8,000 kilometers, depending on the vehicle manufacturer’s specifications and actual working conditions. In harsh environments with high dust levels, high temperatures, or frequent start-stop operation, the oil change interval should be shortened accordingly.

定期更换洒水车发动机润滑油，不仅能保持发动机的良好润滑、清洁内部、中和酸性物质、改善散热，还能显著降低故障率，减少维修成本，提高作业效率。忽视换油看似节省了眼前费用，实则可能带来高昂的发动机维修甚至更换成本。为了洒水车的可靠运行和长久使用寿命，请务必按时更换发动机润滑油。

Regularly changing the engine oil in a water truck not only maintains proper lubrication, cleans internal components, neutralizes acids, and improves heat dissipation, but also significantly reduces failure rates, lowers maintenance costs, and enhances operational efficiency. Neglecting oil changes may seem like a short-term saving, but it can lead to expensive engine repairs or even replacement. For reliable operation and long service life of your water truck, be sure to change the engine oil on schedule.

洒水车的发动机在作业过程中长期处于低转速、高负荷状态，尤其是在频繁启停、低速行驶和长时间怠速的情况下，发动机内部零部件之间的摩擦加剧。润滑油在使用一段时间后会因高温氧化而变质，失去应有的润滑和保护性能，导致发动机磨损加剧，甚至出现拉缸、烧瓦等严重故障。因此，定期更换发动机润滑油，是保障洒水车正常运行、延长发动机寿命的关键措施。

The engine of a water truck often operates under low-speed, high-load conditions, especially during frequent starts and stops, slow driving, and extended idling. This increases friction between internal components. Over time, engine oil degrades due to high-temperature oxidation, losing its lubricating and protective properties. This can lead to increased engine wear and even serious failures such as cylinder scoring or bearing seizure. Therefore, regular oil changes are essential to ensure normal operation and extend the engine’s service life.

保持润滑效果，减少磨损

Maintain Lubrication Effectiveness and Reduce Wear

新润滑油能在发动机各运动部件之间形成稳定的油膜，有效减少金属表面的直接接触，降低摩擦阻力。随着使用时间延长，润滑油中的添加剂逐渐消耗，油膜强度下降，无法继续提供可靠保护。定期换油可以恢复润滑系统的性能，最大限度减少发动机内部磨损。

Fresh engine oil forms a stable oil film between moving parts, effectively reducing direct metal-to-metal contact and lowering friction resistance. Over time, additives in the oil are depleted, and the oil film weakens, failing to provide reliable protection. Regular oil changes restore the lubrication system’s performance and minimize internal engine wear.

清洁发动机内部，防止积碳和油泥

Clean the Engine Internally and Prevent Carbon Deposits and Sludge

洒水车发动机在工作过程中会产生积碳、胶质和油泥等污染物。润滑油中的清净分散剂可以帮助将这些杂质悬浮在油中，并在换油时随旧油排出。如果不及时更换，污染物会逐渐沉积，堵塞油路，影响散热和润滑效果，严重时甚至导致发动机拉缸或涡轮增压器损坏。

During operation, water truck engines produce contaminants such as carbon deposits, varnish, and sludge. The detergents and dispersants in engine oil help suspend these impurities, allowing them to be drained out during an oil change. If the oil is not changed in time, contaminants accumulate, clogging oil passages and impairing heat dissipation and lubrication. In severe cases, this can lead to cylinder scoring or turbocharger damage.

中和酸性物质，防止腐蚀

Neutralize Acids and Prevent Corrosion

燃油燃烧过程中会产生酸性物质，这些物质会逐渐混入润滑油中，对发动机内部的金属部件造成腐蚀。润滑油中的碱值添加剂能中和这些酸性物质，保护发动机不受腐蚀侵害。随着使用时间增加，添加剂的碱值会下降，失去中和能力。定期更换润滑油可以有效防止酸性腐蚀，保护发动机关键部件。

Acidic byproducts from fuel combustion gradually mix with the engine oil and can corrode internal metal components. The base additives in engine oil neutralize these acids, protecting the engine from corrosion. Over time, the total base number (TBN) of the additives decreases, reducing their neutralizing ability. Regular oil changes effectively prevent acid corrosion and protect critical engine components.

改善散热，防止过热

Improve Heat Dissipation and Prevent Overheating

润滑油在发动机中还承担着辅助散热的功能，能够带走燃烧室和摩擦副产生的热量。变质的润滑油流动性变差，散热能力显著下降，容易导致发动机局部温度过高，加速部件老化和损坏。定期更换润滑油可以确保良好的流动性和散热性能，维持发动机在正常工作温度范围内。

Engine oil also plays a role in heat dissipation, carrying away heat generated by combustion and friction. Degraded oil has poorer flow characteristics and significantly reduced heat transfer capability, which can lead to localized overheating and accelerate component aging and failure. Regular oil changes ensure good fluidity and heat dissipation, keeping the engine within its normal operating temperature range.

建议更换周期

Recommended Oil Change Intervals

一般建议洒水车每工作250～300小时或每行驶5000～8000公里更换一次发动机润滑油，具体周期应参考车辆制造商的要求和实际作业环境。在粉尘大、高温或频繁启停的恶劣工况下，应适当缩短换油周期。

It is generally recommended to change the engine oil in a water truck every 250–300 operating hours or every 5,000–8,000 kilometers, depending on the vehicle manufacturer’s specifications and actual working conditions. In harsh environments with high dust levels, high temperatures, or frequent start-stop operation, the oil change interval should be shortened accordingly.

定期更换洒水车发动机润滑油，不仅能保持发动机的良好润滑、清洁内部、中和酸性物质、改善散热，还能显著降低故障率，减少维修成本，提高作业效率。忽视换油看似节省了眼前费用，实则可能带来高昂的发动机维修甚至更换成本。为了洒水车的可靠运行和长久使用寿命，请务必按时更换发动机润滑油。

Regularly changing the engine oil in a water truck not only maintains proper lubrication, cleans internal components, neutralizes acids, and improves heat dissipation, but also significantly reduces failure rates, lowers maintenance costs, and enhances operational efficiency. Neglecting oil changes may seem like a short-term saving, but it can lead to expensive engine repairs or even replacement. For reliable operation and long service life of your water truck, be sure to change the engine oil on schedule.