What kind of engine oil is CH? Analysis and purchasing guide for popular topics across the Internet
Recently, "What is CH engine oil" has become a hot topic in the field of automotive maintenance, especially in car owners' forums and e-commerce platforms. This article will combine hot data from the past 10 days to explain the characteristics, applicable scenarios and market trends of CH engine oil in detail, helping you make smarter purchasing decisions.
1. Definition and characteristics of CH engine oil foundation
CH is a diesel engine oil grade standard formulated by the American Petroleum Society (API). It belongs to the earlier specifications and has been replaced by higher-level CK-4 and FA-4. Its core features are as follows:
| Performance metrics | CH engine oil standard |
|---|---|
| Applicable engine type | High-speed four-stroke diesel engine |
| Antioxidant | Meet engine needs before 1998 |
| Sulfur content compatibility | Adapt to diesel with sulfur content ≤0.5% |
| Current alternative standards | CK-4/FA-4 (released in 2016) |
2. Analysis of hot topics across the Internet
Through big data monitoring, the discussion on CH engine oil in the past 10 days has mainly focused on the following aspects:
| Discuss topic | Popularity index | Core dispute points |
|---|---|---|
| Applicability of old vehicles | 87.5 | Is it suitable for diesel vehicles 2000 years ago |
| Comparison with CI/CJ level | 76.2 | Performance difference and cost-effectiveness |
| Methods for identifying fakes | 68.9 | Packaging anti-counterfeiting feature verification |
| Environmental compliance | 52.1 | Modern emission standards adaptability |
3. Purchase suggestions and precautions
Based on current market research, we give the following practical suggestions:
1.Model matching principle: It is only recommended to be used for old diesel vehicles designed between 1998 and 2004. Modern DPF device vehicles must use CK-4 and above specifications
2.Climate adaptability: The common viscosity level of CH-4 is 15W-40. It is recommended to choose 5W-30 improved formula in severe cold areas in the north.
3.Warning of the current market situation: Mainstream brands have gradually stopped production of CH-grade products, and most of them are currently available in stock or niche brands
| brand | CH-4 product status | Alternatives |
|---|---|---|
| Shell | Retained in some overseas markets | Rimula R4 series |
| Mobil | Completely discontinued production | Delvac 1300 Super CK-4 |
| Castrol | Supply through specific channels | Edge Heavy Duty Series |
4. Interpretation of technological development trends
With the upgrade of emission standards, CH engine oil has shown obvious technical limitations:
•Sulfur compatible bottleneck: Modern ultra-low sulfur diesel (ULSD) may cause CH formula additive imbalance
•Post-processing conflicts: Cannot meet the ash control requirements of diesel particle trap (DPF)
•Fuel economy: Compared with FA-4 specification engine oil, the fuel consumption gap can reach 2-3%
5. Consumer FAQs
In response to recent high-frequency questions, professional technicians gave authoritative answers:
Q: Can CH engine oil be mixed with gasoline engine oil?
A: Absolutely forbidden! Diesel engine oil's ZDDP additive will damage the three-way catalyst of the gasoline engine
Q: Why are there still a large amount of CH engine oil sales on e-commerce platforms?
A: Mainly aimed at export markets such as Africa and Southeast Asia that have not upgraded emission standards
Q: Is it feasible to switch to higher specifications of engine oil?
A: CK-4 is fully backward compatible and provides better piston cleaning and wear protection
Through the above analysis, it can be seen that CH, as a historic engine oil standard, has gradually withdrawn from the mainstream market. It is recommended that car owners choose more modern lubrication solutions based on the actual vehicle conditions, which can not only ensure engine performance but also meet environmental protection requirements. Only by continuously paying attention to API standards updates can you choose the most suitable "blood" for your car.
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