NLGI grease service classification

Service typical of chassis components and universal joints in passenger cars, trucks, and other vehicles operated with frequent republication in non- critical applications. This grease shall satisfactorily lubricate chassis components and universal joints where frequent republication is practiced. During its service life, the grease shall resist oxidation and consistency degradation while protecting the chassis components and universal joints from corrosion and wear under lightly loaded conditions. NLGI #2 consistency greases are commonly recommended, but other grades may also be recommended.

Service typical of chassis components and universal joints in passenger cars, trucks, and other vehicles under mild to severe duty. Severe duty will be encountered in vehicles operated under conditions which may include prolonged relubrication intervals, or high loads, severe vibration, exposure to water or other contaminants, etc. This grease shall resist oxidation and consistency degradation while protecting the chassis components and universal joints from corrosion and wear even when aqueous contamination and heavily loaded conditions occur. NLGI #2 consistency greases are commonly recommended, but other grades may also be recommended.

Service typical of wheel bearings operating in passenger cars, trucks, and other vehicles under mild duty. Mild duty will be encountered in vehicles operated with frequent relubrication in noncritical areas. The grease shall satisfactorily lubricate wheel bearings over a limited temperature range. Many products of this type are limited to bearing temperatures of -4 – 158°F. No additional performance requirements are specified for these greases.

Service typical of wheel bearings operating in passenger cars, trucks, and other vehicles under mild to moderate duty. Moderate duty will be encountered in most vehicles operated under normal urban, highway, and off-highway service. The grease shall satisfactorily lubricate wheel bearings over a wide temperature range. The bearing temperature may range down to -40°F, with frequent excursions to 320°F. During its service life, the grease shall resist oxidation, evaporation, and consistency degradation while protecting the bearings from corrosion and wear. NLGI #2 consistency greases are commonly recommended, but NLGI #1 or #3 grades may also be recommended.

Service typical of wheel bearings operating in passenger cars, trucks, and other vehicles under mild to severe duty. Severe duty will be encountered in certain vehicles operated under conditions resulting in high bearing temperatures. This includes vehicles operated under frequent stop-and-go service (buses, taxis, urban police cars, etc.), or under severe braking service (trailer towing, heavy loading, mountain driving, etc.). The grease shall satisfactorily lubricate wheel bearings over a wide temperature range. The bearing temperatures may range down to -40°F, with frequent excursions to 320°F and occasional excursions to 392°F. During its service life, the grease shall resist oxidation, evaporation, and consistency degradation while protecting the bearings from corrosion and wear. NLGI #2 consistency greases are commonly recommended, but NLGI #1 or #3 grades may also be recommended.