What Is Diesel Oil?
Diesel oil, a specific type of engine oil, is designed for lubrication in diesel engines. Unlike gasoline engine oil, diesel oil can also be used in gasoline engines, but not vice versa. Its use is crucial for the lubrication of cylinders and pistons, ensuring the engine operates smoothly.
Uses of Diesel Oil
Primarily used in diesel engines of automobiles, ships, construction equipment, generators, and agricultural machinery such as tractors and combines, diesel oil is vital for its high fuel efficiency and torque, especially in large ships and fishing boats.
Characteristics of Diesel Oils
Diesel oil is known for its high alkaline content and clean dispersants, which neutralize acids and manage the sulfur content’s oxidation compounds, preventing engine corrosion.
Advantages
- High stability under heat and pressure, promoting safe driving and engine performance.
- Supports strong torque for better acceleration and hill driving.
- High viscosity reduces engine friction and wear, enhancing long-term performance.
Disadvantages
- In cold temperatures, diesel oil’s high viscosity can impair fluidity and make engine starting difficult.
- Diesel oil tends to deteriorate faster than gasoline oil, necessitating more frequent changes.
How to Select Diesel Oils
When selecting diesel oil, consider the engine’s specific requirements for viscosity and specifications over the oil’s grade. Higher-grade oils generally offer better durability and fuel efficiency.
Other Information on Diesel Oils
1. Viscosity of Engine Oil
The viscosity and grade of engine oils, including diesel oil, follow the SAE standards. The viscosity is indicated by numbers like 0W-20 or 10W-40, where the first number indicates low-temperature viscosity and the second high-temperature viscosity.
2. Engine Oil Grade
Engine oil grades are indicated by API standards, with diesel oils beginning with “C” and improving in quality from CA onwards. Agricultural machinery often uses CD or CF standards, while heavy trucks may use CF-4. The JASO standard, applied in Japan, focuses on high-temperature oxidation resistance for diesel engines.