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Understanding the Four Core Indicators of Lubricants: Uncover the Hardcore Strength of AISO Lubricants
Release time:
2026-08-27
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Most vehicle owners and equipment operation and maintenance professionals only focus on lubricant models and applicable equipment types when selecting lubricants, ignoring the core parameters that determine oil quality and equipment service life. Viscosity, High Temperature High Shear (HTHS) viscosity, flash point, and pour point serve as the "performance physical examination report" of lubricants. They directly determine whether lubricants can withstand complex operating conditions such as high temperature, high pressure, extreme cold, and high-speed operation.
As a professional brand deeply rooted in the lubrication industry, AISO Lubricants adheres to strict craftsmanship to control every performance parameter. This article breaks down the four core indicators in plain language, enabling everyone to accurately judge lubricant quality and select high-quality lubricants tailored for diverse working conditions without professional expertise.
1. Viscosity: The Protective Film Thickness of Lubricants
Viscosity is the most familiar and fundamental core attribute of lubricants. Simply put, it refers to the thickness of lubricating oil, which can be metaphorically understood as the thickness of clothing. Higher viscosity means thicker oil and a denser oil film; lower viscosity means thinner oil and better fluidity.
The common misconception that "higher viscosity is always better" is incorrect. The core function of viscosity is to match equipment clearances and balance protection and energy consumption. High-viscosity lubricants form a thick oil film with excellent sealing and wear resistance. They are suitable for old equipment and high-load working conditions, as they can effectively fill worn gaps between parts and reduce mechanical impact and wear. Low-viscosity lubricants feature outstanding fluidity and low resistance, ideal for precision new-generation engines and low-temperature environments. They reduce operating energy consumption, improve power response, and enable rapid lubrication during cold starts.
AISO Lubricants precisely controls the ratio of lubricants across different viscosity ranges. We customize viscosity-specific lubricants for diverse scenarios including passenger vehicles, construction machinery, and industrial equipment. This ensures comprehensive lubrication and protection for parts while avoiding excessive viscosity that leads to increased operating resistance and fuel consumption, achieving a perfect balance between protection performance and economic efficiency.
2. High Temperature High Shear (HTHS) Viscosity: Oil Film Stability Under High-Speed and High-Temperature Conditions
While conventional viscosity reflects the static state of lubricants at room temperature, HTHS viscosity represents the practical and hardcore performance of lubricants, serving as the most overlooked yet critical core indicator.
During high-speed operation of engines and industrial equipment, the internal temperature rises sharply, and high-frequency friction of parts such as pistons, gears, and bearings exerts strong shear and tensile force on lubricants. Under extreme working conditions of high temperature, high pressure, and high-speed shear, inferior ordinary lubricants are prone to molecular fracture, resulting in thinning or even rupture of the oil film, which directly causes dry friction and accelerated wear of metal parts.
In short, a higher HTHS value means more stable oil film and stronger protection under high-temperature and high-speed operating conditions. The industry has clear adaptation standards: an HTHS value of no less than 2.6 meets the basic needs of ordinary household engines, while German high-performance engines, turbocharged engines, and heavy-duty industrial equipment generally require an HTHS value of no less than 3.5 to sustain long-term high-intensity operation.
AISO Lubricants prioritizes the optimization of HTHS performance. Formulated with premium base oils and composite additives, our lubricants maintain a complete, robust oil film at temperatures above 100°C under high-frequency shear conditions, without thinning, performance failure or delamination. They continuously isolate metal-to-metal friction, effectively mitigating issues such as engine oil consumption, component wear and power degradation, making them ideal for harsh operating scenarios including long-distance high-speed driving, heavy-duty operation and high-temperature factory environments.
3. Flash Point: High-Temperature Safety and Temperature Resistance Threshold
Flash point is a core indicator measuring the high-temperature safety and stability of lubricants, defined as the minimum temperature at which oil vapor flashes and burns when exposed to an open flame.
Lubricants operate under sustained high-temperature conditions, where elevated temperatures accelerate oil volatilization and generate oil vapors. A higher flash point signifies lower volatility and superior high-temperature resistance, minimizing the formation of combustible vapors, carbon deposits, oxidative deterioration and oil dilution failure. In contrast, low-quality lubricants with low flash points volatilize excessively at high temperatures, leading to rapid oil depletion and increased safety risks such as equipment malfunction and fire hazards. Furthermore, flash point serves as a vital benchmark for assessing oil degradation and fuel dilution; a sharp decline in flash point indicates substantial performance deterioration and necessitates timely oil replacement.
High-quality fully synthetic lubricants generally have a flash point above 220°C. All AISO lubricant products exceed industry standards with strictly controlled flash point indicators. They greatly reduce oil volatilization loss and safety risks under high-temperature working conditions, resist deterioration and coking during long-term high-temperature operation, and sustain long-lasting oil purity and lubrication performance, perfectly adapting to turbocharged engines, high-temperature industrial equipment and other harsh operating scenarios.
4. Pour Point: Low-Temperature Fluidity Threshold for Cold Environments
While flash point guarantees high-temperature safety, pour point determines low-temperature startup performance, serving as a core indicator of lubricant low-temperature fluidity. The pour point refers to the minimum temperature at which a lubricant maintains fluidity.
As the temperature drops, inferior lubricants gradually thicken and solidify, losing fluidity. Solidified lubricants cannot be quickly delivered to all equipment parts during cold starts, causing dry friction, difficult startup and aggravated startup wear, which significantly shortens equipment service life in the long run. A lower pour point means stronger low-temperature resistance and better fluidity in cold environments.
Developed for frigid regions and low-temperature winter operating conditions, AISO Lubricants optimizes low-temperature formulas to significantly lower the pour point of its lubricants, eliminating common issues including low-temperature solidification, wall adhesion and poor fluidity. Even in extremely cold environments, our lubricants can quickly flow to all equipment lubrication points to deliver instant protective lubrication, enabling reliable cold starts and minimizing low-temperature wear on equipment.
Conclusion: Synergistic Four Indicators Build Premium AISO Lubrication Protection
Viscosity determines the basic lubrication adaptability, HTHS viscosity determines core protection capacity under high-intensity working conditions, flash point determines high-temperature safety and stability, and pour point determines low-temperature environmental adaptability. These four complementary and indispensable indicators form a complete performance system of lubricants.
AISO Lubricants always adheres to strict quality control standards to precisely optimize every core parameter, pursuing balanced and comprehensive performance rather than extreme single indicators. For household vehicles, construction machinery and large-scale industrial equipment, AISO delivers stable, durable and all-condition adaptable lubrication solutions. It safeguards the normal operation of various equipment, reduces operating losses, extends equipment service life and cuts operation and maintenance costs.
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