NLGI is not a quality score
The grade describes consistency. It does not specify base-oil viscosity, load capacity, water resistance, or oxidation life.
Match consistency to delivery
Long lines and centralized systems may need softer grades, while exposed points may need stronger retention. Temperature changes pumpability and leakage.
Use the full application data
Check speed, load, temperature, base-oil viscosity, thickener, sealing, dust, water, and OEM recommendation before changing grade.