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Engine oil additives are chemical compounds mixed into engine oil to enhance its performance or provide additional protection to the engine.

In many cases, modern engine oils already contain additives that provide sufficient protection for engines. However, in certain situations, such as high-performance engines, older engines, or extreme operating conditions, additional additives may be beneficial.

Common types of additives include detergents, dispersants, anti-wear agents, viscosity modifiers, antioxidants, friction modifiers, and corrosion inhibitors.

Some additives, such as friction modifiers, claim to reduce friction between moving parts, potentially leading to improved fuel efficiency. However, the actual impact on fuel economy may vary depending on the engine and driving conditions.

While some additives may help address minor issues like noisy lifters or reduce oil consumption, they cannot fix major mechanical problems. It’s essential to address underlying issues with proper maintenance and repairs.