What is the applicable range of CH-4 diesel engine oil?

[StJade]

CH-grade four-stroke engines. Here are the relevant details: Introduction: CH-4 refers to the quality level being CH-grade, and the '4' denotes four-stroke engines. Currently, CF-4 and CH-4 are the most common. Additional Information: Compared to CF-4 grade, CH-4 grade exhibits significant improvements in the following performance aspects: superior anti-wear properties, effectively reducing wear on piston rings, cylinder liners, and valve train components; enhanced high-temperature resistance, effectively controlling deposit formation to maintain engine cleanliness and smooth operation; and better shear stability, effectively preventing viscosity loss to ensure long-lasting and stable lubrication protection.

[MasonLee]

I've been using diesel vehicles myself, especially pickup trucks and farm tractors. CH-4 diesel oil is mainly suitable for older diesel engines, such as vehicles manufactured before 2004. It can handle high-sulfur fuel environments, protecting the engine from corrosion and deposits. Its application scope includes light-duty trucks, construction machinery, and some long-distance transport vehicles, but it's not suitable for modern vehicles with high emission standards. From my personal experience, using CH-4 results in smoother engine starts and reduces wear during long-distance driving in suburban and mountainous areas. The recommended maintenance interval is an oil change every 8,000 kilometers. However, remember that if the fuel quality is poor or the temperature is extremely low, its effectiveness may be compromised, making it less environmentally friendly than newer specifications like CI-4. When changing the oil, always check the dipstick and avoid mixing different brands to prevent unstable oil pressure. In summary, CH-4 is suitable for everyday driving in non-high-performance vehicles, but avoid pushing it too hard in urban traffic congestion areas.

[EmersynFitz]

I often do my own car maintenance, and in my opinion, CH-4 diesel oil is suitable for turbocharged diesel engines, like older trucks and excavators. Its application covers high-load operations such as construction sites and long-distance transportation, as it helps reduce smoke emissions and engine overheating. Based on my experience, it's compatible with early 2000s vehicle types, but you need to pay attention to the sulfur content in the fuel; otherwise, its protective properties diminish. The advantage of using CH-4 is its low cost, with an oil change interval of 6,000 to 10,000 kilometers, helping avoid frequent repairs. However, it's not recommended for newer engines because it's not friendly to catalytic converters—upgrading to CI-4 is better. Regular oil testing is crucial, and don’t overlook oil temperature monitoring.

[DelIan]

I've been driving a diesel car for a short time and think CH-4 diesel oil is mainly suitable for older models produced after 2000, such as certain SUVs and vans. It's designed for high-sulfur fuel and suitable for suburban and rural driving, with decent engine protection. Avoid using it in modern vehicles to prevent malfunctions, and check the vehicle manual for recommended grades. Generally, maintenance is straightforward.