Lubricating Grease Analysis

Supporting Effective Lubrication and Equipment Reliability

Lubricating grease is a solid or semi-solid lubricant formulated from three primary components: base oil, thickener, and additives. Together, these components determine how the grease reduces friction, protects against wear, and performs under different temperatures, loads, and operating conditions.

Grease analysis provides valuable information about lubricant quality, consistency, and suitability for its intended application. Testing helps identify changes that may affect lubrication performance and supports informed decisions on product selection, maintenance, and replacement.

ETLCO’s Oil & Gas Laboratory supports clients in evaluating lubricating grease through testing scopes tailored to the grease type, equipment requirements, and applicable specifications.

Key Areas of Grease Analysis

Base Oil Assessment

The base oil provides the primary lubricating film that helps reduce friction and wear between moving surfaces. Grease formulations may use mineral, synthetic, or vegetable-derived base oils. Assessing relevant base oil properties, where applicable, supports evaluation of lubricant quality and suitability for the intended operating conditions.

Thickener Evaluation

The thickener forms a structure that retains the base oil and helps maintain the grease’s consistency. Evaluation of relevant properties helps assess the grease’s ability to retain its structure and provide lubrication when exposed to temperature changes and mechanical stress.

Additive Performance Assessment

Additives enhance properties such as oxidation resistance, corrosion protection, and wear control. Appropriate testing helps evaluate these performance characteristics within the finished grease formulation and supports assessment against application requirements.

Grease Consistency Testing

Consistency influences how grease flows, remains in place, and reaches lubricated surfaces. Tests such as cone penetration measure the firmness or softness of the grease, supporting consistency classification and comparison with specified requirements.

Thermal Performance and Oxidation Stability

Thermal and oxidation testing evaluates selected aspects of grease behavior when exposed to heat and oxidative conditions. These assessments help identify susceptibility to degradation, hardening, softening, or other changes that may affect lubrication performance over time.

The selection of parameters and test methods depends on the grease formulation, sample condition, and client specifications. Our laboratory team can confirm the appropriate scope for each enquiry.

Applications

Lubricating grease analysis supports a range of maintenance and quality-control needs, including:

• Bearings and other grease-lubricated mechanical components.

• Automotive and heavy-duty equipment.

• Industrial machinery and manufacturing facilities.

• Equipment operating under elevated temperatures or demanding loads.

• Incoming lubricant inspection and supplier evaluation.

• Investigations into changes in grease condition or lubrication performance.

Benefits of Lubricating Grease Analysis

A suitable testing program helps clients:

• Assess grease quality and consistency.

• Compare material properties with equipment and product specifications.

• Identify changes associated with degradation or service conditions.

• Support lubricant selection and maintenance planning.

• Investigate lubrication-related equipment concerns.

• Reduce the risk of using unsuitable or deteriorated grease.