The specific conditions of the vehicle and the use of the environment to select the appropriate viscosity level of lubricant

The selection of diesel engine lubricating oil for heavy-duty vehicles, and diesel engine lubricating oil for heavy-duty vehicles are the most important ones to select the appropriate type of lubricant, including viscosity grade and quality grade. Automotive Processes and Materials Diesel engine lubricating oils can be classified into single-grade oils and multi-grade oils according to their viscosity standards. The oils that can reach the high-temperature or low-temperature single-viscosity standard oils are called single-stage oils. Oils that meet both high and low temperature performance standards are called oils. Multigrade oils, multigrade oils are generally represented by two grades of winter and summer. Because single-stage oil must be replaced with oils of different viscosity levels in winter and summer, it is very troublesome, and multi-grade oils use a wide temperature range and can be used throughout the year. Although the prices are relatively high, they are easy to use, eliminating the need for replacement. Oil troubles have now become mainstream products in the diesel engine lubricant market. Because different grades of multi-grade oils are suitable for different ambient temperature ranges, the applicable ambient temperature range for the most commonly used multi-grade oils for diesel engines is given, and the user can reasonably select them according to specific conditions.

Selection of Gear Lubricants for Heavy-duty Vehicles The selection of gear lubricants for heavy-duty vehicles is mainly based on two considerations: The lubricant with the appropriate viscosity level must be selected according to the specific conditions of the vehicle used and the environment of use; it must be selected according to the load conditions of the vehicles used. Suitable quality grade lubricants. The table gives the classification of the viscosity of vehicle gear oils, gives the applicable ambient temperature range for gear oils of various viscosity grades, and gives the quality classification of gear oils for vehicles. The user can select the appropriate gear oil based on the data and instructions given in the table in accordance with the specific conditions of the vehicle used.

Applicable to light-to-medium diesel engines and light gasoline engines, due to high-quality combustion as a prerequisite for use, it requires anti-bearing corrosion and high temperature deposition performance. Does not require anti-abrasion and prevents deposition. Suitable for light to medium-duty diesel engines. It is required to prevent wear and deposition during low-temperature combustion. It is also required to prevent bearing corrosion and high temperature deposition when using high-sulfur fuels. It is suitable for light-pressurized diesel engines. Moderate operation and excessive operation, also applies to high-load gasoline engines, requiring high temperature deposition resistance, low temperature deposition resistance, and corrosion resistance for supercharged diesel engines that prevent high-speed wear and depositability during high-speed high-power operation. Turbocharged diesel engines can use a variety of quality fuels and require anti-bearing corrosion and high temperature deposition.

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