How to identify the quality of CI-4 15W/40 Diesel Engine Oil

The quality of CI-4 15W/40 Diesel Engine Oil can be distinguished from the following aspects:
1. Appearance inspection
Color and transparency: High-quality engine oil has uniform color, usually light yellow to dark brown. If the color of the engine oil is too dark or even black, it may be contaminated or severely oxidized. At the same time, good engine oil has high transparency and no turbidity or precipitation. Looking through the oil barrel, clear and transparent engine oil is generally of good quality.
Flowability: At a suitable temperature, the engine oil should have good flowability. Pour a small amount of engine oil on a flat surface, such as a clean metal plate, and good quality engine oil can spread quickly without sticking or agglomeration. This shows that the viscosity of the engine oil meets the 15W/40 standard and can circulate normally in the engine.
2. Brand and certification
Brand reputation: Choosing engine oil from a well-known brand is an important way to ensure quality. Big brands usually have strict production standards and quality control systems, and the CI-4 15W/40 Diesel Engine Oil they produce has undergone a lot of testing and market verification. For example, brands such as Mobil and Castrol have been deeply involved in the engine oil industry for many years, and their product quality is relatively more guaranteed.
API certification mark: Check whether there is an API certification mark on the engine oil barrel. CI-4 is the quality grade standard established by API, and the engine oil that truly meets the standard will be clearly marked on the packaging. If there is no such certification mark or the mark is unclear, there may be problems with the engine oil quality.
3. Additive composition and performance testing
Additive information: High-quality engine oil will add a variety of high-performance additives, such as anti-wear agents, antioxidants, detergents and dispersants. You can check the product manual or consult the manufacturer to understand the type and content of additives.
Performance test report: Some professional engine oil manufacturers will provide performance test reports, including anti-wear performance test, antioxidant performance test and other data. Through these reports, you can intuitively understand the quality level of the engine oil. If conditions permit, you can also send the engine oil sample to a professional testing agency for testing.
If you are interested in learning more about how to identify the quality of CI - 4 15W/40 Diesel Engine Oil, etc., please pay attention to www.power-oils.com and start your efficient journey. We look forward to working with you and providing tailor-made solutions for your business.