November 12, 2025

NLGI grade defines the consistency of grease and determines how it flows, stays in place, and performs in different applications. This article explains what NLGI grade means, how grades 000–6 are classified, and why choosing the correct NLGI grade is essential for effective grease lubrication and equipment protection.

Grease and oil serve different lubrication purposes and are not interchangeable in mechanical systems. This article explains the key differences between grease and oil, how each lubricant functions, and when to use grease or oil based on load, speed, sealing needs, and maintenance conditions.