At low ambient temperatures, lubricants can thicken, impeding pumpability and delaying machinery start‑up. The Low Temperature Dynamic Viscosity Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. quantifies lubricant flow behavior under sub-zero conditions, supporting formulation of winter‑grade oils.

Foaming in lubricants can impair heat transfer, reduce film strength, and lead to cavitation in pumps. Changsha Friend’s Lubricating Oils Foaming Characteristics Tester systematically evaluates both foam tendency and stability at multiple temperatures, guiding anti‑foam additive optimization.

Flash point is a key safety parameter for flammable liquids, indicating the lowest temperature at which vapors ignite in air. The Automatic Open Cup Flash Point Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. automates the open‑cup method (ASTM D92/ISO 2592), improving repeatability and operator safety.

Reducing metal‑to‑metal wear is a primary objective in lubricant formulation. The Lubricant Anti‑Wear Performance Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. evaluates a lubricant’s ability to protect contact surfaces under boundary and mixed lubrication regimes, offering quantitative wear metrics for R&D and quality control.

In high‑temperature applications such as engine crankcases and industrial gearboxes, lubricant volatility can lead to oil consumption, deposit formation, and changes in viscosity. The Lubricating Oil Evaporation Loss Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. quantifies the mass loss of a lubricant sample under controlled thermal and airflow conditions, providing a clear indicator of its resistance to evaporation.