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What Happens to Lubricants in Extreme Heat?

Extreme heat affects more than just human comfort. High temperatures also place tremendous stress on vehicles, engines, industrial machinery, and the lubricants that protect them. While most people think about cooling systems during summer, lubricants are equally critical in maintaining performance and preventing wear under elevated operating temperatures.

Every engine and machine generates heat during operation. Under normal conditions, lubricants are designed to manage friction, reduce wear, assist in cooling, and maintain smooth movement between components. However, when ambient temperatures rise significantly, lubricants are forced to operate under much harsher conditions. Thermal stress, oxidation, viscosity breakdown, and sludge formation become increasingly common challenges.

Understanding how extreme heat affects lubricants helps explain why lubricant quality and proper maintenance become even more important during high-temperature operating conditions.

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Director's Voice

Sushant Bansal
Director,
Paras Lubricants Limited

How the Wrong Oil Destroys an Engine Over Time

There is a common belief among vehicle owners and even many businesses that engine oil is interchangeable. As long as something is “lubricating,” the job is being done. After four decades in this industry, I can say with certainty that this is one of the most expensive misconceptions people carry.

Engines do not fail overnight because of the wrong oil. They fail quietly, gradually, and often irreversibly. By the time the damage becomes visible, the root cause has already done its work.

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